Dyfyniad APA

(1976). The blue book: Leaders of the English speaking world [1976]. St. James Press.

Dyfyniad Arddull Chicago

The Blue Book: Leaders of the English Speaking World [1976]. London: St. James Press, 1976.

Dyfyniad MLA

The Blue Book: Leaders of the English Speaking World [1976]. St. James Press, 1976.

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