Gaya APA

Essentials of research methods in psychology / Jeanne S. Zechmeister, Eugene B. Zechmeister, John J. Shaughnessy. (2001). : Boston Mass. : McGraw-Hill.

Gaya MLA

Essentials of research methods in psychology / Jeanne S. Zechmeister, Eugene B. Zechmeister, John J. Shaughnessy. . : Boston Mass. : McGraw-Hill, 2001. Text.