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.
Chicago-referens (17:e uppl.)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division och Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. Ibadan: The Division, 1968.
MLA-referens (8:e uppl.)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division och Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. The Division, 1968.