Spiegler, M. D. (2016). Contemporary behavior therapy (Sixth edition.). Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Spiegler, Michael D. Contemporary Behavior Therapy. Sixth edition. Boston, Massachusetts: Cengage Learning, 2016.
Lua MLA (9ú heag.)Spiegler, Michael D. Contemporary Behavior Therapy. Sixth edition. Cengage Learning, 2016.
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