Rujukan Hidrosfera

  1. ↑ ὕδωρ, Henry George Liddell, Robert Scott, A Greek-English Lexicon, on Perseus
  2. ↑ σφαῖρα, Henry George Liddell, Robert Scott, A Greek-English Lexicon, on Perseus
  3. ↑ Marq de Villiers (2003). Water: The Fate of Our Most Precious Resource (edisi 2). Toronto, Ontario: McClelland & Stewart. m/s. 453. ISBN 978-0-7710-2641-6. OCLC 43365804. 
  4. 1 2 World Water Resources: A New Appraisal and Assessment for the 21st Century (Laporan). UNESCO. 1998. http://webworld.unesco.org/water/ihp/publications/waterway/webpc/world_water_resources.html. Diperolehi 13 June 2013.
  5. ↑ Kennish, Michael J. (2001). Practical handbook of marine science. Marine science series (edisi 3rd). CRC Press. m/s. 35. ISBN 0-8493-2391-6. 
  6. 1 2 3 Marq de Villiers (2003). Water: The Fate of Our Most Precious Resource (edisi 2). Toronto, Ontario: McClelland & Stewart. m/s. 453. ISBN 978-0-7710-2641-6. OCLC 43365804.