Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division. (1967). Western State of Nigeria statistical bulletin. The Division.
Citação do estilo Chicago (17ª ed.)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division. Western State of Nigeria Statistical Bulletin. Ibadan: The Division, 1967.
Citação MLA (8ª ed.)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division. Western State of Nigeria Statistical Bulletin. The Division, 1967.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.