Dyfyniad APA

(2013). Outline of U.S. government. USA: Bureau of International Information Programs.

Dyfyniad Arddull Chicago

Outline of U.S. Government. USA: Bureau of International Information Programs, 2013.

Dyfyniad MLA

Outline of U.S. Government. USA: Bureau of International Information Programs, 2013.

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