Graham, Jesse; Haidt, Jonathan; Nosek, Brian A. (2009). «Liberals and conservatives rely on different sets of moral foundations.». Journal of Personality and Social Psychology (American Psychological Association) 96 (5): 1029-1046. ISSN1939-1315. PMID19379034. doi:10.1037/a0015141.
Graham, Jesse; Haidt, Jonathan; Nosek, Brian A. (2009). «Liberals and conservatives rely on different sets of moral foundations.». Journal of Personality and Social Psychology (American Psychological Association) 96 (5): 1029-1046. ISSN1939-1315. PMID19379034. doi:10.1037/a0015141.
Graham, Jesse; Haidt, Jonathan; Nosek, Brian A. (2009). «Liberals and conservatives rely on different sets of moral foundations.». Journal of Personality and Social Psychology (American Psychological Association) 96 (5): 1029-1046. ISSN1939-1315. PMID19379034. doi:10.1037/a0015141.