Peter Grubb, "Hippopotamus,". Mammal Species of the World, (3rd ed.), Don E. Wilson & DeeAnn M. Reeder (ed.), Johns Hopkins University Press, 2005, Pages 637 - 722
Pienaar, U. de V.; Van Wyk, P.; Fairall, N. (1966). “An experimental cropping scheme of Hippopotami in the Letaba river of the Kruger National Park”. Koedoe9 (1). doi:10.4102/koedoe.v9i1.778.
UNEP (2021). Hippopotamus amphibius. The Species+ Website. Nairobi, Kenya. Compiled by UNEP-WCMC, Cambridge, UK. Available at: www.speciesplus.net. [Accessed 02/05/2021]
