Παραπομπή σε μορφή APA (7η εκδ.)

Lang, A. H. (1974). Guide to the geology of Elk Island National Park: The origin of its hills and other scenery. Dept. of Energy, Mines and Resources : available from Information Canada.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Lang, A. H. Guide to the Geology of Elk Island National Park: The Origin of Its Hills and Other Scenery. Ottawa: Dept. of Energy, Mines and Resources : available from Information Canada, 1974.

Παραπομπή σε μορφή MLA (8th εκδ.)

Lang, A. H. Guide to the Geology of Elk Island National Park: The Origin of Its Hills and Other Scenery. Dept. of Energy, Mines and Resources : available from Information Canada, 1974.