Dyfyniad APA

Bellack, A. S., & Hersen, M. (1977). Behavior modification: An introductory textbook. Williams & Wilkins.

Dyfyniad Arddull Chicago

Bellack, Alan S., and Michel Hersen. Behavior Modification: An Introductory Textbook. Baltimore: Williams & Wilkins, 1977.

Dyfyniad MLA

Bellack, Alan S., and Michel Hersen. Behavior Modification: An Introductory Textbook. Williams & Wilkins, 1977.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.