APA (7e ed.) Bronvermelding

Haag, S., & Cummings, M. (2008). Information systems essentials (2nd ed.). McGraw-Hill/Irwin.

Chicago (17e ed.) Bronvermelding

Haag, Stephen, en Maeve Cummings. Information Systems Essentials. 2nd ed. Boston: McGraw-Hill/Irwin, 2008.

MLA (9e ed.) Bronvermelding

Haag, Stephen, en Maeve Cummings. Information Systems Essentials. 2nd ed. McGraw-Hill/Irwin, 2008.