Dyfyniad APA

(2003). Outline of the U.S. Economy. USA: United states Information Agency.

Dyfyniad Arddull Chicago

Outline of the U.S. Economy. USA: United states Information Agency, 2003.

Dyfyniad MLA

Outline of the U.S. Economy. USA: United states Information Agency, 2003.

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