Dyfyniad APA

(2006). Encyclopedia of American holidays and national days. Westport: Greenwood press.

Dyfyniad Arddull Chicago

Encyclopedia of American Holidays and National Days. Westport: Greenwood press, 2006.

Dyfyniad MLA

Encyclopedia of American Holidays and National Days. Westport: Greenwood press, 2006.

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