Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Citation Edition Citation

Grove, N. (1979). North Yemen: Once a crossroads for the frankincense trade, now a flash point in global politics. National Geographic Society.

Chicago Citation Edition Citation

Grove, Noel. North Yemen: Once a Crossroads for the Frankincense Trade, Now a Flash Point in Global Politics. Washington, D.C.: National Geographic Society, 1979.

MLA Citation Edition Citation

Grove, Noel. North Yemen: Once a Crossroads for the Frankincense Trade, Now a Flash Point in Global Politics. National Geographic Society, 1979.