APA (7th ed.) Citation

U.S. Coast and Geodetic Survey & Swick, C. H. (1921). Modern methods for measuring intensity of gravity. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

U.S. Coast and Geodetic Survey and Clarence H. Swick. Modern Methods for Measuring Intensity of Gravity. [Washington?]: U.S. Government Printing Office, 1921.

MLA (9th ed.) Citation

U.S. Coast and Geodetic Survey and Clarence H. Swick. Modern Methods for Measuring Intensity of Gravity. U.S. Government Printing Office, 1921.