Gaya APA

Shaughnessy, J, J., S, I, Z, E, I, Z, J. (2003). Research methods in psychology . New York: .

Gaya MLA

Shaughnessy, John, J., S, I., Zechmeister,, Eugene, II., Zechmeister,, James. "Research methods in psychology". New York: , 2003. Text.