APA (7th ed.) Citation

United States. Hydrographic Office. (1939). 1939 Radio Aids to Navigation: Volume II, Radio Weather Broadcasts. [s.n.].

Chicago Style (17th ed.) Citation

United States. Hydrographic Office. 1939 Radio Aids to Navigation: Volume II, Radio Weather Broadcasts. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Hydrographic Office. 1939 Radio Aids to Navigation: Volume II, Radio Weather Broadcasts. [s.n.], 1939.

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