APA (7th ed.) Citation

U.S. Coast and Geodetic Survey. (1941). United States Earthquakes, 1939. [s.n.].

Chicago Style (17th ed.) Citation

U.S. Coast and Geodetic Survey. United States Earthquakes, 1939. [Washington]: [s.n.], 1941.

MLA (9th ed.) Citation

U.S. Coast and Geodetic Survey. United States Earthquakes, 1939. [s.n.], 1941.