Orang utan sumatra (Indonesian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Orang utan sumatra" in Indonesian language version.

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S. A. Wich; S. S. Utami-Atmoko; T. M. Setia; H. D. Rijksen; C. Schürmann, J.A.R.A.M. van Hooff and C. P. van Schaik (2004). "Life history of wild Sumatran orangutans (Pongo abelii)". Journal of Human Evolution. 47 (6): 385–398. doi:10.1016/j.jhevol.2004.08.006.
S. A. Wich; I. Singleton; S. S. Utami-Atmoko; M. L. Geurts; H. D. Rijksen; and C. P. van Schaik (2003). "The status of the Sumatran orang-utan Pongo abelii: an update". Flora & Fauna International. 37 (1): 49. doi:10.1017/S0030605303000115.

Singleton, I., Wich, S.A. & Griffiths, M. (2007). Pongo abelli. 2007 IUCN Red List of Threatened Species. IUCN 2007. Diakses pada 2007-09-13. Database entry includes justification for why this species is critically endangered

"Singapore's most famous ape celebrates 46th birthday". Khaleej Times. 18 June 2006. Diarsipkan dari versi asli tanggal 2008-04-22. Diakses tanggal 2009-04-15.

"Singapore's most famous ape celebrates 46th birthday". Khaleej Times. 18 June 2006. Diarsipkan dari versi asli tanggal 2008-04-22. Diakses tanggal 2009-04-15.