Cita APA (7a ed.)

Edwards, C., Ward, J., & Bytheway, A. (1991). The essence of information systems. Prentice-Hall.

Cita Chicago Style (17a ed.)

Edwards, Chris, John Ward, y A. Bytheway. The Essence of Information Systems. New York [etc.]: Prentice-Hall, 1991.

Cita MLA (9a ed.)

Edwards, Chris, et al. The Essence of Information Systems. Prentice-Hall, 1991.