APA (7th ed.) Citation

U.S. Coast and Geodetic Survey & Hazard, D. L. (1930). Directions for magnetic measurements. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

U.S. Coast and Geodetic Survey and Daniel L. Hazard. Directions for Magnetic Measurements. [Washington?]: U.S. Government Printing Office, 1930.

MLA (9th ed.) Citation

U.S. Coast and Geodetic Survey and Daniel L. Hazard. Directions for Magnetic Measurements. U.S. Government Printing Office, 1930.