Porter-Roth. (2002). Request for proposal: A guide to effective RFP development. Addison-Wesley.
Lua i Stíl Chicago (17ú heag.)Porter-Roth. Request for Proposal: A Guide to Effective RFP Development. Boston,MA: Addison-Wesley, 2002.
Lua MLA (8ú heag.)Porter-Roth. Request for Proposal: A Guide to Effective RFP Development. Addison-Wesley, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.