Western Region (Nigeria). Forest Dept. Annual report on the forest administration of the Western Region of Nigeria. Govt. Printer.
Chicago-viite (17. p.)Western Region (Nigeria). Forest Dept. Annual Report on the Forest Administration of the Western Region of Nigeria. Ibadan: Govt. Printer.
MLA-viite (8. p.)Western Region (Nigeria). Forest Dept. Annual Report on the Forest Administration of the Western Region of Nigeria. Govt. Printer.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.