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スタイル(17版)引用形式Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division , Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. Ibadan: The Division, 1968.
MLA(8版)引用形式Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division , Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. The Division, 1968.