BURCH, J., & GRUDNITSKI, G. (1989). Information systems: Theory and practice.-- Ed.5. John Wiley and Sons.

BURCH, John, and Gary GRUDNITSKI. Information Systems: Theory and Practice.-- Ed.5. New York: John Wiley and Sons, 1989.

BURCH, John, and Gary GRUDNITSKI. Information Systems: Theory and Practice.-- Ed.5. John Wiley and Sons, 1989.