Dyfyniad APA

SCHWITZGEBEL, R. K. Changing Human Behavior: Principles of planned intervention. McGraw-Hill Book Company.

Dyfyniad Arddull Chicago

SCHWITZGEBEL, Ralph K. Changing Human Behavior: Principles of Planned Intervention. McGraw-Hill Book Company.

Dyfyniad MLA

SCHWITZGEBEL, Ralph K. Changing Human Behavior: Principles of Planned Intervention. McGraw-Hill Book Company.

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