Gaya APA

Watson, D, L., Tharp, R, G. (1985). Self directed behavior : self modification for personal adjusment (4th ed). Monterey, CA: Brooks/Cole.

Gaya MLA

Watson, David, L.., Tharp, Roland, G.. "Self directed behavior : self modification for personal adjusment". 4th ed Monterey, CA: Brooks/Cole, 1985. Text.