APA (7th ed.) Citation

United States. Hydrographic Office. (1920). Baltic pilot: Volume II. Gulf of Finland, Aland Islands, Aland Sea, and Gulf of Bothnia. GPO.

Chicago Style (17th ed.) Citation

United States. Hydrographic Office. Baltic Pilot: Volume II. Gulf of Finland, Aland Islands, Aland Sea, and Gulf of Bothnia. [Washington]: GPO, 1920.

MLA (9th ed.) Citation

United States. Hydrographic Office. Baltic Pilot: Volume II. Gulf of Finland, Aland Islands, Aland Sea, and Gulf of Bothnia. GPO, 1920.

Warning: These citations may not always be 100% accurate.