Gaya APA

THORPE, G, L., OLSON, S, L. (1990). Bahavior therapy : concepts, procedures, and applications . Leiden: Allyn and bacon.

Gaya MLA

THORPE, Geoffrey, L.., OLSON, Sheryl, L.. "Bahavior therapy : concepts, procedures, and applications". Leiden: Allyn and bacon, 1990. Text.