Dyfyniad APA
Boehm, R. G., Armstrong, D. G., & Hunkins, F. P. (2002). Geography: The world and its people. Glencoe/ McGraw-Hill.
Dyfyniad Arddull Chicago
Boehm, Richard G., David G. Armstrong, and Francis P. Hunkins. Geography: The World and Its People. New York: Glencoe/ McGraw-Hill, 2002.
Dyfyniad MLA
Boehm, Richard G., et al. Geography: The World and Its People. Glencoe/ McGraw-Hill, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.