Dyfyniad APA

Crandell, T. L., Crandell, C. H., & Vander Zanden, J. W. (2009). Human development (9th ed.). New York: McGraw-Hill Higher Education.

Dyfyniad Arddull Chicago

Crandell, Thomas L., Corinne Haines Crandell, và James Wilfrid Vander Zanden. Human Development. 9th ed. New York: McGraw-Hill Higher Education, 2009.

Dyfyniad MLA

Crandell, Thomas L., Corinne Haines Crandell, và James Wilfrid Vander Zanden. Human Development. 9th ed. New York: McGraw-Hill Higher Education, 2009.

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