Cita APA

United States Naval Observatory. Nautical Almanac Office. (2018). The Nautical almanac for the year 2019. Washington: U.S. Government Publishing Office.

Citación estilo Chicago

United States Naval Observatory. Nautical Almanac Office. The Nautical Almanac for the Year 2019. Washington: U.S. Government Publishing Office, 2018.

Cita MLA

United States Naval Observatory. Nautical Almanac Office. The Nautical Almanac for the Year 2019. Washington: U.S. Government Publishing Office, 2018.