Bibliografía:

Noëlle F. Kümpel, Alex Quinn, Elise Queslin, Sophie Grange, David Mallon and Jean-Joseph Mapilanga (2015). Okapi (Okapia johnstoni): Conservation Strategy and Status Review. Gland, Switzerland: IUCN and Institut Congolais pour la Conservation de la Nature (ICCN). pp. 5

Mallon, D., Kümpel, N., Quinn, A., Shurter, S., Lukas, J., Hart, J.A., Mapilanga, J., Beyers, R. & Maisels, F. 2015. Okapia johnstoni. The IUCN Red List of Threatened Species 2015: e.T15188A51140517. http://dx.doi.org/10.2305/IUCN.UK.2015-4.RLTS.T15188A51140517.en

Aguilar, B. 2020. "Okapia johnstoni" (On-line), Animal Diversity Web. Accessed July 20, 2022 at https://animaldiversity.org/accounts/Okapia_johnstoni/

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