Dyfyniad APA

Grolier Internartional. (1987). Grolier academic encyclopedia: Vol :12. Grolier Internartional , Academic Aremiracan.

Dyfyniad Arddull Chicago

Grolier Internartional. Grolier Academic Encyclopedia: Vol :12. USA: Grolier Internartional , Academic Aremiracan, 1987.

Dyfyniad MLA

Grolier Internartional. Grolier Academic Encyclopedia: Vol :12. Grolier Internartional , Academic Aremiracan, 1987.

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