Bibliografía:

Foti S. (S.F.) Pongo. diciembre 27, 2021, de Mónaco Nature Encyclopeia Sitio web: https://www.monaconatureencyclopedia.com/pongo-pygmaeus/?lang=es

Singleton, I., Wich , S.A., Nowak, M., Usher, G. & Utami-Atmoko, S.S. 2017. Pongo abelii (errata version published in 2018). The IUCN Red List of Threatened Species 2017: e.T121097935A123797627. https://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T121097935A115575085.en. Accessed on 28 december 2021.

Courtenay, J., C. Groves, and P. Andrews. 1988. Inter- or intra-island variation? An assessment of the differences between Bornean and Sumatran orangutans. In: J.H. Schwartz, ed. Orangutan Biology, pp.19-29. New York: Oxford University Press.