Earle, K. W. (1936). The geological map: An elementary text book for students of geography and geology. Methuen.
Lua i Stíl Chicago (17ú heag.)Earle, Kenneth W. The Geological Map: An Elementary Text Book for Students of Geography and Geology. London: Methuen, 1936.
Lua MLA (8ú heag.)Earle, Kenneth W. The Geological Map: An Elementary Text Book for Students of Geography and Geology. Methuen, 1936.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.