Edwards, C., & Ward, J. (1996). The essence of information systems (2nd ed.). Prentice hall of India.
استشهاد بنمط شيكاغوEdwards, Chris, و John Ward. The Essence of Information Systems. 2nd ed. New Delhi: Prentice hall of India, 1996.
MLA استشهادEdwards, Chris, و John Ward. The Essence of Information Systems. 2nd ed. Prentice hall of India, 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.