Maddi, S. R. (1972). Personality theories: A comparative analysis. Dorsey.
Lua i Stíl Chicago (17ú heag.)Maddi, Salvatore R. Personality Theories: A Comparative Analysis. Illinois: Dorsey, 1972.
Lua MLA (9ú heag.)Maddi, Salvatore R. Personality Theories: A Comparative Analysis. Dorsey, 1972.
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