ROYER PAUL S. (2002). PROJECT RISK MANAGEMENT: PROACTIVE APPROACH. MANAGEMENT CONCEPTS.
Lua i Stíl Chicago (17ú heag.)ROYER PAUL S. PROJECT RISK MANAGEMENT: PROACTIVE APPROACH. VIENNA: MANAGEMENT CONCEPTS, 2002.
Lua MLA (9ú heag.)ROYER PAUL S. PROJECT RISK MANAGEMENT: PROACTIVE APPROACH. MANAGEMENT CONCEPTS, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.