APA (7th ed.) Citation

Zigler, E., & Hodapp, R. M. (1986). Understanding mental retardation (1. publ.). Cambridge Univ. Pr.

Chicago Style (17th ed.) Citation

Zigler, Edward, and Robert M. Hodapp. Understanding Mental Retardation. 1. publ. Cambridge u.a: Cambridge Univ. Pr, 1986.

MLA (9th ed.) Citation

Zigler, Edward, and Robert M. Hodapp. Understanding Mental Retardation. 1. publ. Cambridge Univ. Pr, 1986.