APA (7th ed.) Citation

United States Naval Observatory. Nautical Almanac Office. (1909). American ephemeris and nautical almanac for year 1909. [publisher not identified].

Chicago Style (17th ed.) Citation

United States Naval Observatory. Nautical Almanac Office. American Ephemeris and Nautical Almanac for Year 1909. [Washington]: [publisher not identified], 1909.

MLA (9th ed.) Citation

United States Naval Observatory. Nautical Almanac Office. American Ephemeris and Nautical Almanac for Year 1909. [publisher not identified], 1909.