APA (7th ed.) Citation

United States Naval Observatory. Nautical Almanac Office. (1980). Almanac for computers. Nautical Almanac Office, United States Naval Observatory.

Chicago Style (17th ed.) Citation

United States Naval Observatory. Nautical Almanac Office. Almanac for Computers. Washington, D.C.: Nautical Almanac Office, United States Naval Observatory, 1980.

MLA (9th ed.) Citation

United States Naval Observatory. Nautical Almanac Office. Almanac for Computers. Nautical Almanac Office, United States Naval Observatory, 1980.