1. Adekunbi, E. (2011). The Rot in Okomu Oil, The Tell Magazine, Monday, 23 May 2011.
2. Akinsorotan, O. A., Ogunjemite, B. G., & Afolayan, T. A. (2011). Assessment of the large mammals of Arakhuan range, Okomu national park, Nigeria. Ethiopian Journal of Environmental Studies and Management, 4(3), 25–37.
3. Alagoa, E. J., & Derefaka, A. A. (2002). The land and people of riverstate: Eastern Niger Delta (pp. 53–83). Port Harcourt: Onyoma Research Publications.
4. Alaoga, E. J., Anozie, F. N., & Nzewunwa, N. (1988). The early history of the Niger Delta (pp. 16–18). Buske: Hamburg.
5. Barbour, K. M., Oguntoyinbo, J. S., Onyemelukwe, J. O. C., & Nwafor, J. C. (1982). Nigeria in maps. London: Hodder and Stoughton.