APA (7e ed.) Bronvermelding

Earle, K. W. (1936). The geological map: An elementary text book for students of geography and geology. Methuen.

Chicago (17e ed.) Bronvermelding

Earle, Kenneth W. The Geological Map: An Elementary Text Book for Students of Geography and Geology. London: Methuen, 1936.

MLA (8e ed.) Bronvermelding

Earle, Kenneth W. The Geological Map: An Elementary Text Book for Students of Geography and Geology. Methuen, 1936.