Dyfyniad APA

De Blij, H., & Muller, P. O. (1997). Geography: Realms, Religions, and concepts (8th ed.). John Wiley & Sons.

Dyfyniad Arddull Chicago

De Blij, H.J, and Peter O. Muller. Geography: Realms, Religions, and Concepts. 8th ed. New York: John Wiley & Sons, 1997.

Dyfyniad MLA

De Blij, H.J, and Peter O. Muller. Geography: Realms, Religions, and Concepts. 8th ed. John Wiley & Sons, 1997.

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