APA (7th ed.) Citation

U.S. Coast and Geodetic Survey. (1911). Results of observations made at U.S. Coast and Geodetic Survey magnetic observatory at Sitka, Alaska, 1911 and 1912. 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, 1911 and 1912. [Washington]: GPO, 1911.

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, 1911 and 1912. GPO, 1911.