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.
Citação do estilo Chicago (17ª ed.)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division e Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. Ibadan: The Division, 1968.
Citação MLA (8ª ed.)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division e Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. The Division, 1968.