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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division و Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. Ibadan: The Division, 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division و Western State (Nigeria). Ministry of Economic Planning and Reconstruction. Statistics Division. Western State of Nigeria Statistical Abstract. The Division, 1968.