Heckel, R. V., Peacock, L. J., & McCarter, L. (1966). Textbook of general psychology. Mosby.
Cita Chicago (17th ed.)Heckel, Robert V., Lelon J. Peacock, i Louis McCarter. Textbook of General Psychology. Saint Louis: Mosby, 1966.
Cita MLA (9th ed.)Heckel, Robert V., et al. Textbook of General Psychology. Mosby, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.