Dyfyniad APA

(1986). The American presidents: The office and the men. Connecticut: Grolier Educational Corporation.

Dyfyniad Arddull Chicago

The American Presidents: The Office and the Men. Connecticut: Grolier Educational Corporation, 1986.

Dyfyniad MLA

The American Presidents: The Office and the Men. Connecticut: Grolier Educational Corporation, 1986.

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