Gaya APA

Thorpe, G, L., Olson, S, L. (1990). Behaviour therapy : concepts, procedures and applications . Boston, MA: Allyn and Bacon.

Gaya MLA

Thorpe, Geoffrey, L.., Olson, Sheryl, L.. "Behaviour therapy : concepts, procedures and applications". Boston, MA: Allyn and Bacon, 1990. Text.