Dyfyniad APA

American Geographical Society of New York, Bowman, I., & Wrigley, G. M. Geographical review. American Geographical Society.

Dyfyniad Arddull Chicago

American Geographical Society of New York, Isaiah Bowman, and G. M. Wrigley. Geographical Review. [New York]: American Geographical Society.

Dyfyniad MLA

American Geographical Society of New York, et al. Geographical Review. American Geographical Society.

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