Dyfyniad APA

United States. Central Intelligence Agency. (1968). Bulgaria: 5-68. [Washington.

Dyfyniad Arddull Chicago

United States. Central Intelligence Agency. Bulgaria: 5-68. [Washington, 1968.

Dyfyniad MLA

United States. Central Intelligence Agency. Bulgaria: 5-68. [Washington, 1968.

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