http://www.people.ku.edu/~preacher/sobel/sobel.htm
http://davidakenny.net/cm/mediate.htm
http://www.victoria.ac.nz/psyc/paul-jose-files/modgraph/continuous_data.php
http://davidakenny.net/cm/moderation.htm
Links importantes:
Tabachnick, B., L. Fidell (2006) Using Multivariate Statistics, USA, Person International Edition, 5ª.
Reis, E. (1997) Estatística Multivariada Aplicada, Lisboa, Sílabo.
Maroco, J. (2010) Análise Estatística com o PASW Statistics (ex-SPSS), Pero Pinheiro.
Hair, J., R. Anderson, R. Tatham & W. Black (2006) Multivariate Data Analysis, Upper Saddle River: Pearson 6ª ed.
Field, A. (2005) Discovering Statistics Using SPSS, London, Sage, 2ª ed.
Baron, R & D. Kenny (1986) The Moderator-Mediator Variable Distinction in Social Psychological research: Conceptual, Strategic and Statistical Considerations, Journal of Personality and Social Psychology, 51, 1173-1182.
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Secundária
Tabachnick, B., L. Fidell (2000) Computer-assisted research design and analysis, Boston: Ally and Bacon.
Cohen, J., P. Cohen, S. West, L. Aiken (2003) Applied Multiple Regression/Correlation. Analysis for the Behavioral Sciences, Mahawh: Laurence Erlbaum, 3ª ed.
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