Citazione Stile APA (7a Edizione)

Ratzan, L. (2004). Understanding information systems: What they do and why we need them. American Library Association.

Citazione stile Chigago Style (17a edizione)

Ratzan, Lee. Understanding Information Systems: What They Do and Why We Need Them. Chicago: American Library Association, 2004.

Citatione MLA (9a ed.)

Ratzan, Lee. Understanding Information Systems: What They Do and Why We Need Them. American Library Association, 2004.