APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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