Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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