Dyfyniad APA

Vander Zanden, J. W. (1997). Human development (Six edition.). McGraw-Hill.

Dyfyniad Arddull Chicago

Vander Zanden, James Wilfrid. Human Development. Six edition. New York: McGraw-Hill, 1997.

Dyfyniad MLA

Vander Zanden, James Wilfrid. Human Development. Six edition. McGraw-Hill, 1997.

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