APA (7th ed.) Citation

United States. Hydrographic Office. (1923). List of lights with fog signals and visible time signals of British Islands, English Channel, and North Sea: Volume IV. Including uniform time system, radio time signals, radio weather bulletins, and radio compass stations of world; corrected to Nov. 3, 1923. GPO.

Chicago Style (17th ed.) Citation

United States. Hydrographic Office. List of Lights with Fog Signals and Visible Time Signals of British Islands, English Channel, and North Sea: Volume IV. Including Uniform Time System, Radio Time Signals, Radio Weather Bulletins, and Radio Compass Stations of World; Corrected to Nov. 3, 1923. [Washington]: GPO, 1923.

MLA (9th ed.) Citation

United States. Hydrographic Office. List of Lights with Fog Signals and Visible Time Signals of British Islands, English Channel, and North Sea: Volume IV. Including Uniform Time System, Radio Time Signals, Radio Weather Bulletins, and Radio Compass Stations of World; Corrected to Nov. 3, 1923. GPO, 1923.