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.
Παραπομπή σε μορφή Chicago (17η εκδ.)Her 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.
Παραπομπή σε μορφή MLA (8th εκδ.)Her 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.
