APA (7th ed.) Citation

United States. Hydrographic Office. (1937). 1938 Radio Aids to Navigation, Volume I, Including Details of Direction-Finder Stations, Radiobeacons, Navigational Warnings, Time Signals, Etc. [s.n.].

Chicago Style (17th ed.) Citation

United States. Hydrographic Office. 1938 Radio Aids to Navigation, Volume I, Including Details of Direction-Finder Stations, Radiobeacons, Navigational Warnings, Time Signals, Etc. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

United States. Hydrographic Office. 1938 Radio Aids to Navigation, Volume I, Including Details of Direction-Finder Stations, Radiobeacons, Navigational Warnings, Time Signals, Etc. [s.n.], 1937.