Freberg, L. (1999). Introductory psychology: Contending ideas and opinions. Coursewise Publishing, Inc.
Lua i Stíl Chicago (17ú heag.)Freberg, Laura. Introductory Psychology: Contending Ideas and Opinions. Boulder, CO: Coursewise Publishing, Inc, 1999.
Lua MLA (9ú heag.)Freberg, Laura. Introductory Psychology: Contending Ideas and Opinions. Coursewise Publishing, Inc, 1999.
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