Dyfyniad APA

(2010). Annual Editions: World History. United States: McGraw-Hill.

Dyfyniad Arddull Chicago

Annual Editions: World History. United States: McGraw-Hill, 2010.

Dyfyniad MLA

Annual Editions: World History. United States: McGraw-Hill, 2010.

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