APA (7th ed.) Citation

Cassel, R. N. (1974). The EGO development scale. Psychologists and Educators, inc..

Chicago Style (17th ed.) Citation

Cassel, Russell N. The EGO Development Scale. Jacksonville, Ill.: Psychologists and Educators, inc., 1974.

MLA (9th ed.) Citation

Cassel, Russell N. The EGO Development Scale. Psychologists and Educators, inc., 1974.