Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, 2010-11 Edition, Psychologists, on the Internet at [1]Arxivat 2012-01-04 a Wayback Machine. (consultat el 8 de juliol de 2010).
Windholz, G. «Ivan P. Pavlov: An overview of his life and psychological work». American Psychologist, 52, 1997, pàg. 941–946. DOI: 10.1037/0003-066X.52.9.941. ISSN: 0003-066X.
«Psicologia». Diccionari enciclopèdic de medicina. Enciclopèdia Catalana, S.A. 1997-2010. Arxivat de l'original el 2012-10-02. [Consulta: 2 novembre 2010].
(Steven Blankaart, p. 13) que apareix a "psychology n." A Dictionary of Psychology. Edited by Andrew M. Colman. Oxford University Press 2009. Oxford Reference Online. Oxford University Press.[2]
Karl Popper, Conjectures and Refutations, London: Routledge and Keagan Paul, 1963, pp. 33-39. A Theodore Schick (ed.), Readings in the Philosophy of Science, Mountain View, CA: Mayfield Publishing Company, 2000, pp. 9-13. [3]
web.archive.org
«Psicologia». Diccionari enciclopèdic de medicina. Enciclopèdia Catalana, S.A. 1997-2010. Arxivat de l'original el 2012-10-02. [Consulta: 2 novembre 2010].
Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, 2010-11 Edition, Psychologists, on the Internet at [1]Arxivat 2012-01-04 a Wayback Machine. (consultat el 8 de juliol de 2010).
Windholz, G. «Ivan P. Pavlov: An overview of his life and psychological work». American Psychologist, 52, 1997, pàg. 941–946. DOI: 10.1037/0003-066X.52.9.941. ISSN: 0003-066X.
