Dyfyniad APA

Degnan-Veness, C., & Veness, C. (2013). The United States of America. London: Macmillan.

Dyfyniad Arddull Chicago

Degnan-Veness, Coleen., và Chantal Veness. The United States of America. London: Macmillan, 2013.

Dyfyniad MLA

Degnan-Veness, Coleen., và Chantal Veness. The United States of America. London: Macmillan, 2013.

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