Gaya APA

Zechmeister, H, J, S, E, B, Z, J, S. (2012). Research Methods in Psychology . New York: Mc Graw Hill.

Gaya MLA

Zechmeister, Hn, J., Shaughnessy,, Eugene, B., Zechmeister,, Jeanne, S.. "Research Methods in Psychology". New York: Mc Graw Hill, 2012. Text.