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.
Παραπομπή σε μορφή Chicago (17η εκδ.)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division και Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. Ibadan: The Division, 1968.
Παραπομπή σε μορφή MLA (8th εκδ.)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division και Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. The Division, 1968.