Bibliography

These informations are taken from:
-Unknown, Animal Extinction, 2007, Available at: http://www.ideaconnection.com/solutions/441-Animal-extinction.html, 4/24/2011
-Newitz Annalee, Will 50 Percent of vertebrates go extinct over the next century?, 27 October 2010, Available at http://io9.com/#!5674278/will-50-percent-of-vertebrates-go-extinct-over-the-next-century, 4/24/2011
-Unknown, Sejumlah Vertebrata Dunia Diambang Kepunahan, October 29 2010, Available at: http://teknologitinggi.wordpress.com/2010/10/29/sejumlah-vertebrata-dunia-diambang-kepunahan/, 4/24/2011
-Vibeka Sisodiya, Conserving our world's vertebrates, Nov 7 2010, Available at: http://www.youngzine.com/article/conserving-our-world-s-vertebrates, 4/24/2011