Citação norma APA
Ratzan, L. (2004). Understanding information systems: What they do and why we need them. American Library Association.
Citação norma Chicago
Ratzan, Lee. Understanding Information Systems: What They Do and Why We Need Them. Chicago: American Library Association, 2004.
Citação norma MLA
Ratzan, Lee. Understanding Information Systems: What They Do and Why We Need Them. American Library Association, 2004.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.