Watson, D. L. (1985). Self-directed behavior: Self modification for personal adjustments (4th ed.). Brooks/ Cole.
Cita Chicago (17th ed.)Watson, David L. Self-directed Behavior: Self Modification for Personal Adjustments. 4th ed. Monterey, California: Brooks/ Cole, 1985.
Cita MLA (9th ed.)Watson, David L. Self-directed Behavior: Self Modification for Personal Adjustments. 4th ed. Brooks/ Cole, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.