Title: Behavior Modification in Mental Retardation: The Education and Rehabilitation of the Mentally Retarded Adolescent and Adult, Author: William Gardner
Title: Beyond Gentle Teaching: A Nonaversive Approach to Helping Those in Need / Edition 1, Author: J.J. McGee
Title: Handbook of Behavior Modification with the Mentally Retarded / Edition 2, Author: Johnny L. Matson