Cita APA (7th ed.)

Engel, G. L. (1962). Psychological development in health and disease. Saunders.

Cita Chicago (17th ed.)

Engel, George Libman. Psychological Development in Health and Disease. Philadelphia: Saunders, 1962.

Cita MLA (9th ed.)

Engel, George Libman. Psychological Development in Health and Disease. Saunders, 1962.