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  1. ↑ Seidelmann, P. Kenneth (2005). "Phases of the Moon". Explanatory Supplement to the Astronomical Almanac. University Science Books. m/s. 478. ISBN 0-935702-68-7. They are the times when the excess of the Moon's apparent geocentric ecliptic longitude λM di atas kemunculan longitude epliptik geocentrik Matahari adalah 0, 90, 180, or 270 ... 
  2. ↑ Phillips, Tony (9 December 2008). "Biggest Full Moon of the Year". Science@NASA. Dicapai 4 March 2010. 
  3. ↑ Meeus, Jean (1998). "Phases of the Moon". Astronomical Algorithms (edisi 2nd). Richmond, Virginia: Willmann-Bell. m/s. 349–354. ISBN 0-943396-61-1. 
  4. ↑ Meeus, Jean (2002). "The Duration of the Lunation". More Mathematical Astronomy Morsels. Richmond, Virginia: Willmann-Bell. m/s. 19–31. ISBN 0-943396-74-3. 
  5. ↑ Sky and Telescope "What's a blue moon?"