Porter-Roth. (2002). Request for proposal: A guide to effective RFP development. Addison-Wesley.
Chicago-referens (17:e uppl.)Porter-Roth. Request for Proposal: A Guide to Effective RFP Development. Boston,MA: Addison-Wesley, 2002.
MLA-referens (8:e uppl.)Porter-Roth. Request for Proposal: A Guide to Effective RFP Development. Addison-Wesley, 2002.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.