Kheir, A. M. M. (1978). A conceptual model of computer based information systems requirements for a governmental department in a developing country. The George Washington University.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Kheir, Abubaker Mustafa M. A Conceptual Model of Computer Based Information Systems Requirements for a Governmental Department in a Developing Country. Washington: The George Washington University, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Kheir, Abubaker Mustafa M. A Conceptual Model of Computer Based Information Systems Requirements for a Governmental Department in a Developing Country. The George Washington University, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.