7 Pennings, Paul; Keman, Hans; and Kleinnijenhuisb,, Jan (2006), Doing Research in Political Science. An Introduction to Comparative Methods and Statistics, London: Sage Publications.
6 Gerring, John (2007), Case Study Research - Principles and Practices, Cambridge: Cambridge University Press.
5 Davies, Martin B. E Hughes, Nathan (2014), Doing a Successful Research Project: Using Qualitative or Quantitative Methods
4 Dalton, Russell J., e Klingemann, Hans-Dieter (eds.) (2008), The Oxford Handbook of Political Behavior, Oxford, OUP.
3 Creswell, John W. (2003), Research Design. Qualitative, Quantitative, and Mixed Methods Approaches, Thousand Oaks: Sage.
2 Brady, Henry E. and Collier, David (ed.) (2010), Rethinking Social Inquiry. Diverse Tools, Shared Standards, New York: Rowman & Littlefield.
1 Barakso, Maryann; Sabet, Daniel M.; Schaffner, Brian (2014), Understanding Political Science Research Methods. The Challenge of Inference, New York: Routledge
:
Secundária
Silverman, D. (2005): Doing Qualitative Research: A Practical Handbook. 2nd ed. London: Sage.
Ritchie, J. & Lewis, J. (eds.) (2003): Qualitative Research Practice. A Guide for Social Science Students and Researchers, Thousand Oaks, CA: Sage Publications.
Ragin, Charles C. e Howard S. Becker (eds.) (1994), What Is a Case? Exploring the Foundations of Social Inquiry, Cambridge, Cambridge University Press.
Punch, Keith F. (1998), Introduction to Social Research: Quantitative & Qualitative Approaches, Londres, Sage. Ragin, Charles (1987), The Comparative Method. Moving Beyond Qualitative and Quantitative Strategies, Berkley, University of California Press.
Peters, Guy B. (2012), Institutional Theory in Political Science: The New Institutionalism, London: Continuum.
Peters, Guy B. (1998), Comparative Politics. Theory and Methods, NEW YORK , New York University Press.
O'Dochartaigh, Nial (2002), The INTERNET Research Handbook: a Practical Guide for Students and Researchers in the Social Sciences, Londres, Sage Publications.
Mosley, Layna (ed.) (2013), Interview Research in Political Science, Itacha and London: Cornell University Press.
Morton, Rebecca B. and Williams, Kenneth C. (2010), Experimental Political Science and the Study of Causality. From Nature to the Lab, Cambridge: Cambridge University Press.
Kvale, S. & Brinkmann, S. (2008): Interviews: Learning the craft of qualitative research interviewing, 2nd ed. Thousand Oaks, New Delhi, London, Singapore: Sage.
Della Porta, Donatella e Michael Keating (eds.) (2008), Approaches and Methodologies in the Social Sciences. A Pluralist Perspective, Cambridge, Cambridge University Press.
Dalton, Russell J., e Klingemann, Hans-Dieter (eds.) (2007), The Oxford Handbook of Political Behavior, Oxford, Oxford University Press.
Charles Ragin,(1987), The Comparative Method. Moving Beyond Qualitative and Quantitative Strategies, Berkley, University of California Press.
Brady, Henry E. and David Collier (2004), Rethinking Social Inquiry: Diverse Tools Shared Standards, Lanham, Rowman & Littlefield Publishers.
Booth, Wayne C., Gregory G. Colomb e Joseph M. Williams (2003), The Craft of Research, Chicago, The University of Chicago Press.
Boix, Carles, e Stokes, Susan (editors) (2007), The Oxford Handbook of Comparative Politics, Oxford, Oxford University Press.
Blaikie, Norman (2007), Approaches to social enquiry: advancing knowledge, Cambridge, Polity Press.
Black, Thomas R. (1993), Evaluating Social Science Research: An Introduction, Londres, Sage.
Babbie, Earl (1989), The practice of Social Research, Belmont, California Wadsworth Publishing Company.
Valdavida, M.C. (1998), Bancos de datos, Madrid, CIS.
Robinson, John P., et al (eds) (1999), Measures of political Attitudes, San Diego/California, Academic Press
Kittilson, Miki Caul (2007), ?Research resources in comparative political behavior?, Dalton, Russell J., e Klingemann, Hans-Dieter (eds.), The Oxford Handbook of Political Behavior, Oxford, Oxford University Press, pp. 865-895.
King, Gary (1997), ?Qualitative Overview?, in A Solution to the Ecological Inference Problem. Reconstructing Individual Behavior from Aggregate Data, Princeton, Princeton University Press, 1997, pp. 3-34.
Kiecolt, K. Jill, e Laura E. Nathan (1985), Secondary Analysis of Survey Data, Londres, Sage.
Gubrium, J. F. & Holstein, J. A. (eds.) (2001): Handbook of Interview Research: Context and Methodology. Thousand Oaks, CA: Sage Publications.
Gerring, John (2004), "What is a Case Study and What is it Good For?", American Political Science Review, 98(2), pp. 341-53.
George, Alexander L. and Bennett, Andrew (2005), Case Studies and Theory Developments in the Social Sciences, Cambridge, MA: MIT Press.
Gauthier, Benoît, e Jean Turgeon (2003, 2000), « Os dados secundários », in Benoît Gauthier (org.), Investigação Social. Da Problemática à Colheita de Dados, Loures, Lusociência, pp. 417-446.
Flick, U. (2005), Métodos Qualitativos na Investigação Científica, Lisboa, Monitor.
Druckman, James N. et al (ed.) (201), Handbook of Experimental Political Science, Cambridge: Cambridge University Press.
Denzin, N.K. & Lincoln, Y.S. (eds.) (2005): The Sage Handbook of Qualitative Research, 3rd edition. Thousand Oaks, CA, London: Sage.
Continental: Clivagens, Economia e Voto em Eleições Legislativas, 1983-1999,, Oeiras, Celta, pp. 33-43.
Dalton, Russell J., e Klingemann, Hans-Dieter (eds.) (2008), The Oxford Handbook of Political Behavior, Oxford, OUP.Freire, André (2001), ?Metodologia?, in Mudança Eleitoral em Portugal
Collier, David (2011), "Understanding Process Tracing", Political Science and Politics 44(4), pp. 823-30.
Burgess, Robert G. (1997), A Pesquisa de Terreno. Uma Introdução, Oeiras, Celta.Collier, David (1999, 1991), ?El método comparativo: dos décadas de cambios?, in Sartori, Giovanni, e Leonardo Morlino, La Comparación en las Ciencias Sociales, Madrid, Alianza Editorial, pp. 51-81. (**)
Bryman, Alan (2004, 2001), Social Research Methods, Oxford, Oxford University Press.
Bell, Judith (1997), Como Realizar um Projecto de Investigação, Lisboa, Gradiva.
: