Dyfyniad APA
G Boehm, R., Armstrong, D. G., & Hunkins, F. P. (2002). Geography: The world and its people. Glencoe/McGraw-Hill.
Dyfyniad Arddull Chicago
G Boehm, Richard, David G. Armstrong, and Francis P. Hunkins. Geography: The World and Its People. New York: Glencoe/McGraw-Hill, 2002.
Dyfyniad MLA
G Boehm, Richard, 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.