Feldman, R. S. (1996). Understanding psychology (4th.).
Chicago Style (17th ed.) ZitazioaFeldman, Robert S. Understanding Psychology. 4th. New York : McGraw-Hill Education, 1996.
MLA (9th ed.) ZitazioaFeldman, Robert S. Understanding Psychology. 4th. 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.