United States. Hydrographic Office. (1907). International code of signals: American edition. GPO.
Chicago Style (17th ed.) CitationUnited States. Hydrographic Office. International Code of Signals: American Edition. [Washington]: GPO, 1907.
MLA (9th ed.) CitationUnited States. Hydrographic Office. International Code of Signals: American Edition. GPO, 1907.
Warning: These citations may not always be 100% accurate.