Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division. (1967). Western State of Nigeria statistical bulletin. The Division.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division. Western State of Nigeria Statistical Bulletin. Ibadan: The Division, 1967.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division. Western State of Nigeria Statistical Bulletin. The Division, 1967.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.