Dyfyniad APA

(2011). Annual editions: American government 2010/2011. Boston: McGraw-Hill.

Dyfyniad Arddull Chicago

Annual Editions: American Government 2010/2011. Boston: McGraw-Hill, 2011.

Dyfyniad MLA

Annual Editions: American Government 2010/2011. Boston: McGraw-Hill, 2011.

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