Dyfyniad APA

Dacey, J. S., & Travers, J. F. (2004). Human development across the lifespan (Updated 5th ed.). Boston, MA: McGraw-Hill.

Dyfyniad Arddull Chicago

Dacey, John S., và John F. Travers. Human Development Across the Lifespan. Updated 5th ed. Boston, MA: McGraw-Hill, 2004.

Dyfyniad MLA

Dacey, John S., và John F. Travers. Human Development Across the Lifespan. Updated 5th ed. Boston, MA: McGraw-Hill, 2004.

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