Gaya APA

Zechmeister, J, J, S, E, B, Z, J, S. (2012). Research methods in psychology (9th ed). New York: McGrawhill.

Gaya MLA

Zechmeister, John, J., Shaughnessy,, Eugene, B., Zechmeister,, Jeanne, S.. "Research methods in psychology". 9th ed New York: McGrawhill, 2012. Electronic Resource.