Gaya APA

Zechmeister, J, S., J, I, Z, E, B, I, S, J. (2001). Essentials of research methods in psychology . New York: .

Gaya MLA

Zechmeister, Jeanne, S., J, I., Zechmeister,, Eugene, B, II., Shaughnessy,, John. "Essentials of research methods in psychology". New York: , 2001. Text.