Dyfyniad APA

Mussen, P. H., Congre, J. J., & Kagan, J. (1979). Psychological development: A life-span approach. Harper & Row, Publishers.

Dyfyniad Arddull Chicago

Mussen, Paul Henry, John Janeway Congre, and Jerome Kagan. Psychological Development: A Life-span Approach. New York, NY: Harper & Row, Publishers, 1979.

Dyfyniad MLA

Mussen, Paul Henry, et al. Psychological Development: A Life-span Approach. Harper & Row, Publishers, 1979.

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