Maddi, S. R. (1996). Personality theories: A comparative analysis (6th ed.). Brooks / Cole.
Lua i Stíl Chicago (17ú heag.)Maddi, Salvatore R. Personality Theories: A Comparative Analysis. 6th ed. New York: Brooks / Cole, 1996.
Lua MLA (9ú heag.)Maddi, Salvatore R. Personality Theories: A Comparative Analysis. 6th ed. Brooks / Cole, 1996.
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