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.