Dyfyniad APA

Hartshorn, T. A., & Alexander , J. W. (2004). Economic geography (3rd ed.). Prentice-Hall.

Dyfyniad Arddull Chicago

Hartshorn, Truman A., and John W. Alexander. Economic Geography. 3rd ed. New Delhi: Prentice-Hall, 2004.

Dyfyniad MLA

Hartshorn, Truman A., and John W. Alexander. Economic Geography. 3rd ed. Prentice-Hall, 2004.

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