United States Naval Observatory. Nautical Almanac Office & Great Britain. Nautical Almanac Office. (2002). The astronomical almanac for the year 2004 and its companion The Astronomical Almanac Online: Data for astronomy, space sciences, geodesy, surveying, navigation and other applications. U.S. G.P.O.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States Naval Observatory. Nautical Almanac Office و Great Britain. Nautical Almanac Office. The Astronomical Almanac for the Year 2004 and Its Companion The Astronomical Almanac Online: Data for Astronomy, Space Sciences, Geodesy, Surveying, Navigation and Other Applications. Washington, D.C: U.S. G.P.O, 2002.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United States Naval Observatory. Nautical Almanac Office و Great Britain. Nautical Almanac Office. The Astronomical Almanac for the Year 2004 and Its Companion The Astronomical Almanac Online: Data for Astronomy, Space Sciences, Geodesy, Surveying, Navigation and Other Applications. U.S. G.P.O, 2002.