Dyfyniad APA

Alan F arbogast. (2011). Discoveing physical geography (2nd.). John Wiley.

Dyfyniad Arddull Chicago

Alan F arbogast. Discoveing Physical Geography. 2nd. New York: John Wiley, 2011.

Dyfyniad MLA

Alan F arbogast. Discoveing Physical Geography. 2nd. John Wiley, 2011.

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