Dyfyniad APA

Ruch, J. C. Psychology the personal science. Wadsworth Publishing Company.

Dyfyniad Arddull Chicago

Ruch, John C. Psychology the Personal Science. Wadsworth Publishing Company.

Dyfyniad MLA

Ruch, John C. Psychology the Personal Science. Wadsworth Publishing Company.

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