Rujukan Biosfera

  1. ↑ Biosphere. The Columbia Encyclopedia, Edisi Keenam. Columbia University Press. 2004. Dicapai 12 November 2010. 
  2. ↑ Campbell, Neil A. (2006). Biology: Exploring Life. Boston, Massachusetts: Pearson Prentice Hall. ISBN 0-13-250882-6.  Parameter |coauthors= tidak diketahui diabaikan (guna |author=) (bantuan)
  3. ↑ "Meaning of biosphere". WebDictionary.co.uk. WebDictionary.co.uk. Dicapai 2010-11-12. 
  4. ↑ Seuss, E. (1875) Die Entstehung Der Alpen [The Origin of the Alps]. Vienna: W. Braunmuller.