APA (7th ed.) Citation

United States. Hydrographic Office. (1923). Ice supplement to North Atlantic pilot chart. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Hydrographic Office. Ice Supplement to North Atlantic Pilot Chart. [Washington]: [publisher not identified], 1923.

MLA (9th ed.) Citation

United States. Hydrographic Office. Ice Supplement to North Atlantic Pilot Chart. [publisher not identified], 1923.

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