APA (7e ed.) Bronvermelding
ebrary, Inc. (2002). Down to earth: Georgraphic information for sustainable development in Africa. National Academy Press.
Chicago (17e ed.) Bronvermelding
ebrary, Inc. Down to Earth: Georgraphic Information for Sustainable Development in Africa. Washington, D.C.: National Academy Press, 2002.
MLA (9e ed.) Bronvermelding
ebrary, Inc. Down to Earth: Georgraphic Information for Sustainable Development in Africa. National Academy Press, 2002.
Let op: Deze citaties zijn niet altijd 100% accuraat.