APA

Special Learning Corporation, . (1980). Readings in Down's Syndrome. Guilford, Conn: Special Learning Corp.

Chicago

Special Learning Corporation, . 1980. Readings in Down's Syndrome. Guilford, Conn: Special Learning Corp.

Harvard

Special Learning Corporation, . (1980). Readings in Down's Syndrome. Guilford, Conn: Special Learning Corp.

MLA

Special Learning Corporation, . Readings in Down's Syndrome. Guilford, Conn: Special Learning Corp. 1980.