APA (7th ed.) Citation

U.S. Coast and Geodetic Survey. (1930). Magnetic surveys: Purposes, methods, and instruments, revised edition. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

U.S. Coast and Geodetic Survey. Magnetic Surveys: Purposes, Methods, and Instruments, Revised Edition. [Washington?]: U.S. Government Printing Office, 1930.

MLA (9th ed.) Citation

U.S. Coast and Geodetic Survey. Magnetic Surveys: Purposes, Methods, and Instruments, Revised Edition. U.S. Government Printing Office, 1930.