APA-referens (7:e uppl.)

Haag, S., & Cummings, M. (2009). Information systems essentials (3rd ed. customized ed.). McGraw-Hill/Irwin.

Chicago-referens (17:e uppl.)

Haag, Stephen, och Maeve Cummings. Information Systems Essentials. 3rd ed. customized ed. Boston: McGraw-Hill/Irwin, 2009.

MLA-referens (9:e uppl.)

Haag, Stephen, och Maeve Cummings. Information Systems Essentials. 3rd ed. customized ed. McGraw-Hill/Irwin, 2009.