APA-viite

Crawford, M. E., & Mendell, R. (1987). Therapeutic recreation and adapted physical activities for mentally retarded individuals.

Chicago-tyylinen lähdeviittaus

Crawford, Michael E., ja Ron Mendell. Therapeutic Recreation and Adapted Physical Activities for Mentally Retarded Individuals. New Jersey, Prentice-Hall, 1987.

MLA-viite

Crawford, Michael E., ja Ron Mendell. Therapeutic Recreation and Adapted Physical Activities for Mentally Retarded Individuals. 1987.