Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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