Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division & Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. (1968). Western State of Nigeria statistical abstract. The Division.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিWestern State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division এবং Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. Ibadan: The Division, 1968.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিWestern State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division এবং Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. The Division, 1968.