Dyfyniad APA

Barber, J. (2000). Presidents (1st American ed.). Dorling Kindersley Pub..

Dyfyniad Arddull Chicago

Barber, James. Presidents. 1st American ed. New York: Dorling Kindersley Pub., 2000.

Dyfyniad MLA

Barber, James. Presidents. 1st American ed. Dorling Kindersley Pub., 2000.

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