Citazione APA

Edwards, C., & Ward, J. (1996). The essence of information systems (2nd ed.). Prentice hall of India.

Stile di citazione Chicago

Edwards, Chris, e John Ward. The Essence of Information Systems. 2nd ed. New Delhi: Prentice hall of India, 1996.

Citazione MLA

Edwards, Chris, e John Ward. The Essence of Information Systems. 2nd ed. Prentice hall of India, 1996.