Gaya APA

, ., Ullmann, I, S, M, T, I, L, R, F, I, P, R. (2003). Prespective authority for psychologists; a history and guide . Washington: Washington: American psychological Association, 2003.

Gaya MLA

, ., Ullmann, I., Samson,, Morgan, T., II., Levant,, Ronald, F., III., Paige,, Ruth. "Prespective authority for psychologists; a history and guide". Washington: Washington: American psychological Association, 2003, 2003. Text.