APA način citiranja (7. izdanje)
Ratzan, L. (2004). Understanding information systems: What they do and why we need them. American Library Association.
Čikaški stil citiranja (17. izdanje)
Ratzan, Lee. Understanding Information Systems: What They Do and Why We Need Them. Chicago: American Library Association, 2004.
MLA način citiranja (9. izdanje)
Ratzan, Lee. Understanding Information Systems: What They Do and Why We Need Them. American Library Association, 2004.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.