Watson, D. L., & Tharp, R. G. (2002). Self-directed behavior: Self-modification for personal adjustment (8th ed.). Wadsworth/Thomson Learning.
Lua i Stíl Chicago (17ú heag.)Watson, David L., agus Roland G. Tharp. Self-directed Behavior: Self-modification for Personal Adjustment. 8th ed. Belmont, Calif: Wadsworth/Thomson Learning, 2002.
Lua MLA (9ú heag.)Watson, David L., agus Roland G. Tharp. Self-directed Behavior: Self-modification for Personal Adjustment. 8th ed. Wadsworth/Thomson Learning, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.