Cita APA (7th ed.)

Kiernan, C., & Woodford, F. P. (1975). Behaviour modification with the severely retarded. Elsevier.

Cita Chicago (17th ed.)

Kiernan, Chris, i F. Peter Woodford. Behaviour Modification with the Severely Retarded. Amsterdam ; New York: Elsevier, 1975.

Cita MLA (8th ed.)

Kiernan, Chris, i F. Peter Woodford. Behaviour Modification with the Severely Retarded. Elsevier, 1975.