APA (7th ed.) Citation

(1991). Handbook of mental retardation (2. ed.). Pergamon Press.

Chicago Style (17th ed.) Citation

Handbook of Mental Retardation. 2. ed. New York u.a: Pergamon Press, 1991.

MLA (9th ed.) Citation

Handbook of Mental Retardation. 2. ed. Pergamon Press, 1991.