The Manyu River rises near Wabane in the Upper Banyang Subdivision of the Manyu Department of the Southwest Region, Cameroon. The river runs past the southern border of the Mone River Forest Reserve. Below Mamfe, it is joined by rivers draining the Takamanda Forest Reserve and the Cross River National Park in neighboring Nigeria. These protected areas are important habitats for the critically endangered Cross River gorilla. Around the Nigerian border the river takes the name of the Cross River.
- David Harmon; Allen D. Putney (2003). The full value of parks: from economics to the intangible. Rowman & Littlefield. p. 78. ISBN 0-7425-2715-8.
- "Cross River Gorillas". Gorilla-Journal. Archived from the original on 2011-07-24. Retrieved 2011-02-05. CS1 maint: discouraged parameter (link)
- L. Zapfack; J. S. O. Ayeni; S. Besong; M. Mdaihli (November 2001). "ETHNOBOTANICAL SURVEY OF THE TAKAMANDA FOREST RESERVE" (PDF). Archived from the original (PDF) on 2011-07-08. Retrieved 2011-02-05. CS1 maint: discouraged parameter (link)