Procolobus preussi

Dowsett-Lemaire, F. and Dowsett, R. J. 2001. A new population of gorillas Gorilla gorilla and other endangered primates in western Cameroon. African Primates 5: 3?7.

Edwards, A. E. 1992. The diurnal primates of Korup National Park, Cameroon. Abundance, productivity, and polyspecific associations. Thesis, University of Florida.

Groves, C. P. 2001. Primate taxonomy. Smithsonian Institution Press, Washington, DC, USA.

Groves, C. P. 2005. Order Primates. In: D. E. Wilson and D. M. Reeder (eds), Mammal Species of the World, pp. 111-184. The Johns Hopkins University Press, Baltimore, Maryland, USA.

Groves, C. P. 2007. The taxonomic diversity of the Colobinae of Africa. Journal of Anthropological Sciences 85: 7-34.

Grubb, P., Oates, J. F., White, L. J. T. and Tooze, Z. 2000. Monkeys recently added to the Nigerian faunal list. The Nigerian Field 65: 149-158.

Kingdon, J. and Butynski, T. In press. Procolobus preussi. In: T. M. Butynski, J. S. Kingdon and J. Kalina (eds), The Mammals of Africa, Academic Press, Amsterdam, The Netherlands.

Oates, J. F. 1996. African Primates: Status Survey and Conservation Action Plan. IUCN, Gland, Switzerland.