Cita APA (7th ed.)

Watkinson, E. J., & Wall, A. E. (1982). PREP: The PREP play program, play skill instruction for mentally handicapped children. Canadian Association for Health, Physical Education and Recreation.

Cita Chicago (17th ed.)

Watkinson, E. J., i A. E. Wall. PREP: The PREP Play Program, Play Skill Instruction for Mentally Handicapped Children. Ottawa, Ontario: Canadian Association for Health, Physical Education and Recreation, 1982.

Cita MLA (8th ed.)

Watkinson, E. J., i A. E. Wall. PREP: The PREP Play Program, Play Skill Instruction for Mentally Handicapped Children. Canadian Association for Health, Physical Education and Recreation, 1982.