APA (7th ed.) Citation

U.S. Coast and Geodetic Survey. (1915). Results of observations made at U.S. Coast and Geodetic Survey magnetic observatory at Sitka, Alaska, 1915 and 1916. GPO.

Chicago Style (17th ed.) Citation

U.S. Coast and Geodetic Survey. Results of Observations Made at U.S. Coast and Geodetic Survey Magnetic Observatory at Sitka, Alaska, 1915 and 1916. [Washington]: GPO, 1915.

MLA (9th ed.) Citation

U.S. Coast and Geodetic Survey. Results of Observations Made at U.S. Coast and Geodetic Survey Magnetic Observatory at Sitka, Alaska, 1915 and 1916. GPO, 1915.