Dyfyniad APA

Grolier International. (1987). Grolier Academic Encyclopedia: Vol :2. Grolier International,Academic American.

Dyfyniad Arddull Chicago

Grolier International. Grolier Academic Encyclopedia: Vol :2. USA: Grolier International,Academic American, 1987.

Dyfyniad MLA

Grolier International. Grolier Academic Encyclopedia: Vol :2. Grolier International,Academic American, 1987.

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