Cita APA

Kierman, C. C., & Woodford, F. P. (1975). Behaviour modification with the severly retarded.

Citación estilo Chicago

Kierman, C. C., y F. Peter Woodford. Behaviour Modification With the Severly Retarded. 1975.

Cita MLA

Kierman, C. C., y F. Peter Woodford. Behaviour Modification With the Severly Retarded. 1975.