Bellack, A. S., & Hersen, M. (1977). Behavior modification: An introductory textbook. Williams & Wilkins.
Chicago-čujuhus (17. p.)Bellack, Alan S., juo Michel Hersen. Behavior Modification: An Introductory Textbook. Baltimore: Williams & Wilkins, 1977.
MLA-čujuhus (9. p.)Bellack, Alan S., juo Michel Hersen. Behavior Modification: An Introductory Textbook. Williams & Wilkins, 1977.
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