Cita APA (7th ed.)

Wortis, J. 1. . e. Mental retardation. 1-. Grune & Stratton.

Cita Chicago (17th ed.)

Wortis, Joseph 1906- ed. Mental Retardation. 1-. New York: Grune & Stratton.

Cita MLA (9th ed.)

Wortis, Joseph 1906- ed. Mental Retardation. 1-. Grune & Stratton.