↑ Urban, Sean E.; Seidelmann, P. Kenneth (2013). Explanatory Supplement to the Astronomical Almanac (edisi 3rd). Mill Valley, CA: University Science Books. m/s. 13, 231, 239.
↑ Finch, Vernor C., Glenn T. Trewartha, M. H. Shearer, and Frederick L. Caudle (1943). Elementary Meteorology. McGraw-Hill Book Company, Inc. m/s. 17. ASINB005F644PG. Selenggaraan CS1: Pelbagai nama: senarai pengarang (link)
