APA (7th ed.) Citation

Geological Survey (U.S.). (1939). Areal geology of Alaska. [s.n.].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Areal Geology of Alaska. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

Geological Survey (U.S.). Areal Geology of Alaska. [s.n.], 1939.

Warning: These citations may not always be 100% accurate.