Dyfyniad APA

ebrary, Inc, Bertrand, L. M., & Nielson, R. A. (2012). Psychology of individual differences. Nova Science Publishers.

Dyfyniad Arddull Chicago

ebrary, Inc, Lucy M. Bertrand, and Ryan A. Nielson. Psychology of Individual Differences. New York: Nova Science Publishers, 2012.

Dyfyniad MLA

ebrary, Inc, et al. Psychology of Individual Differences. Nova Science Publishers, 2012.

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