Her Majesty's Nautical Almanac Office, Royal Greenwich Observatory Nautical Almanac Office, United States Naval Observatory. (1986). The astronomical almanac for the year 1987: Data for astronomy, space sciences, geodesy, surveying, navigation and other applications. Her Majesty's Stationery Office U.S. Government Printing Office.
Chicago Style (17th ed.) CitationHer Majesty's Nautical Almanac Office, Royal Greenwich Observatory Nautical Almanac Office, United States Naval Observatory. The Astronomical Almanac for the Year 1987: Data for Astronomy, Space Sciences, Geodesy, Surveying, Navigation and Other Applications. London Washington: Her Majesty's Stationery Office U.S. Government Printing Office, 1986.
MLA (8th ed.) CitationHer Majesty's Nautical Almanac Office, Royal Greenwich Observatory Nautical Almanac Office, United States Naval Observatory. The Astronomical Almanac for the Year 1987: Data for Astronomy, Space Sciences, Geodesy, Surveying, Navigation and Other Applications. Her Majesty's Stationery Office U.S. Government Printing Office, 1986.