Urban, S. E., & Seidelmann, P. K. (2013). Explanatory supplement to the Astronomical almanac (3rd ed.). Mill Valley, Calif.: University Science Books.
Chicago Style CitationUrban, Sean E., and P. Kenneth Seidelmann. Explanatory Supplement to the Astronomical Almanac. 3rd ed. Mill Valley, Calif.: University Science Books, 2013.
MLA CitationUrban, Sean E., and P. Kenneth Seidelmann. Explanatory Supplement to the Astronomical Almanac. 3rd ed. Mill Valley, Calif.: University Science Books, 2013.
Warning: These citations may not always be 100% accurate.