APA (7th ed.) Citation

United States. Hydrographic Office. (1901). Specifications for megaphones. [s.n.].

Chicago Style (17th ed.) Citation

United States. Hydrographic Office. Specifications for Megaphones. [Washington]: [s.n.], 1901.

MLA (8th ed.) Citation

United States. Hydrographic Office. Specifications for Megaphones. [s.n.], 1901.

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