Dyfyniad APA

Santrock, J. W. (2008). Life-span development (11th ed.). McGraw-Hill Higher Education.

Dyfyniad Arddull Chicago

Santrock, John W. Life-span Development. 11th ed. Boston, Mass: McGraw-Hill Higher Education, 2008.

Dyfyniad MLA

Santrock, John W. Life-span Development. 11th ed. McGraw-Hill Higher Education, 2008.

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