United States. Hydrographic Office. (1920). List of lights including uniform time system and radio time signals of world: Volume VI. Baltic Sea; corrected to Feb. 1, 1920. GPO.
Chicago Style (17th ed.) CitationUnited States. Hydrographic Office. List of Lights Including Uniform Time System and Radio Time Signals of World: Volume VI. Baltic Sea; Corrected to Feb. 1, 1920. [Washington]: GPO, 1920.
MLA (9th ed.) CitationUnited States. Hydrographic Office. List of Lights Including Uniform Time System and Radio Time Signals of World: Volume VI. Baltic Sea; Corrected to Feb. 1, 1920. GPO, 1920.
Warning: These citations may not always be 100% accurate.