Feldman, R. S. (1996). Understanding psychology (4th.).
Cita Chicago (17th ed.)Feldman, Robert S. Understanding Psychology. 4th. New York : McGraw-Hill Education, 1996.
Cita MLA (9th ed.)Feldman, Robert S. Understanding Psychology. 4th. 1996.
Atenció: Aquestes cites poden no estar 100% correctes.