Cita APA (7th ed.)

Beirnes-Smith, M., Patton, J. R., & Ittenbach, R. (1994). Mental retardation (4th ed.). Merrill.

Cita Chicago (17th ed.)

Beirnes-Smith, Mary, James R. Patton, i Richard Ittenbach. Mental Retardation. 4th ed. New York: Merrill, 1994.

Cita MLA (9th ed.)

Beirnes-Smith, Mary, et al. Mental Retardation. 4th ed. Merrill, 1994.