Dyfyniad APA

Wheeler, J. H., Kostbade, J. T., & Salter, C. L. (1993). Essentials of world regional geography. Saunders College Pub.

Dyfyniad Arddull Chicago

Wheeler, Jesse H., J. Trenton Kostbade, and Christopher L. Salter. Essentials of World Regional Geography. Fort Worth: Saunders College Pub, 1993.

Dyfyniad MLA

Wheeler, Jesse H., et al. Essentials of World Regional Geography. Saunders College Pub, 1993.

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