Burch, J. G., & Grudnitski, G. (1989). Information systems: Theory and practice (5th ed.). Wiley.
Chicago-viite (17. p.)Burch, John G., ja Gary Grudnitski. Information Systems: Theory and Practice. 5th ed. New York: Wiley, 1989.
MLA-viite (9. p.)Burch, John G., ja Gary Grudnitski. Information Systems: Theory and Practice. 5th ed. Wiley, 1989.