Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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