Dyfyniad APA

THE WORLD BOOK ENCYCLOPEDIA. (1989). The world book encyclopedia: W-X-Y-Z. World Book.

Dyfyniad Arddull Chicago

THE WORLD BOOK ENCYCLOPEDIA. The World Book Encyclopedia: W-X-Y-Z. Chicago: World Book, 1989.

Dyfyniad MLA

THE WORLD BOOK ENCYCLOPEDIA. The World Book Encyclopedia: W-X-Y-Z. World Book, 1989.

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