APA

Gordon M. L., Ryan D. H. & Shilo T. (1972). Helping the trainable mentally retarded child develop speech and language: a guidebook for parents, teachers and para-professionals. Springfield, Ill: Thomas.

Chicago

Gordon Michael Lewis, Ryan David H and Shilo Tamar. 1972. Helping the trainable mentally retarded child develop speech and language: a guidebook for parents, teachers and para-professionals. Springfield, Ill: Thomas.

Harvard

Gordon M. L., Ryan D. H. and Shilo T. (1972). Helping the trainable mentally retarded child develop speech and language: a guidebook for parents, teachers and para-professionals. Springfield, Ill: Thomas.

MLA

Gordon Michael Lewis, Ryan David H and Shilo Tamar. Helping the trainable mentally retarded child develop speech and language: a guidebook for parents, teachers and para-professionals. Springfield, Ill: Thomas. 1972.