Ahmed, A. (2017). Assessment of availability, value, and challenges of references service in academic libraries of universities of North West geo-political zone in Northern Nigeria. Kulliyyah of Information and Communication Technology, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ahmed, Aliyu. Assessment of Availability, Value, and Challenges of References Service in Academic Libraries of Universities of North West Geo-political Zone in Northern Nigeria. Kuala Lumpur: Kulliyyah of Information and Communication Technology, International Islamic University Malaysia, 2017.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ahmed, Aliyu. Assessment of Availability, Value, and Challenges of References Service in Academic Libraries of Universities of North West Geo-political Zone in Northern Nigeria. Kulliyyah of Information and Communication Technology, International Islamic University Malaysia, 2017.