PETTIJOHN, T. F. (1987). Psychology A Concise Introduction Terry F. Pettijohn. The Dushkin Publising Group.
Dyfyniad Arddull ChicagoPETTIJOHN, Terry F. Psychology A Concise Introduction Terry F. Pettijohn. The Dushkin Publising Group, 1987.
Dyfyniad MLAPETTIJOHN, Terry F. Psychology A Concise Introduction Terry F. Pettijohn. The Dushkin Publising Group, 1987.
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