APA (7th ed.) Citation

Royal Greenwich Observatory. Nautical Almanac Office & United States Naval Observatory. Nautical Almanac Office. The Astronomical almanac. U.S. Government Printing Office ;.

Chicago Style (17th ed.) Citation

Royal Greenwich Observatory. Nautical Almanac Office and United States Naval Observatory. Nautical Almanac Office. The Astronomical Almanac. Washington ; London: U.S. Government Printing Office ;.

MLA (9th ed.) Citation

Royal Greenwich Observatory. Nautical Almanac Office and United States Naval Observatory. Nautical Almanac Office. The Astronomical Almanac. U.S. Government Printing Office ;.

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