Watson, D. L., & Tharp, R. G. (2014). Self-directed behavior: Self-modification for personal adjustment (Tenth edition.). Wadswoth.
Citazione stile Chigago Style (17a edizione)Watson, David L., e Roland G. Tharp. Self-directed Behavior: Self-modification for Personal Adjustment. Tenth edition. Australia: Wadswoth, 2014.
Citatione MLA (9a ed.)Watson, David L., e Roland G. Tharp. Self-directed Behavior: Self-modification for Personal Adjustment. Tenth edition. Wadswoth, 2014.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.