APA (7e ed.) Bronvermelding

McKenzie, G. D., & Utgard, R. O. Man and his physical environment: Readings in environmental geology.

Chicago (17e ed.) Bronvermelding

McKenzie, Garry D., en Russell O. Utgard. Man and His Physical Environment: Readings in Environmental Geology.

MLA (9e ed.) Bronvermelding

McKenzie, Garry D., en Russell O. Utgard. Man and His Physical Environment: Readings in Environmental Geology.

Let op: Deze citaties zijn niet altijd 100% accuraat.