WILLIAMS, C., & HEINS, R. M. (1989). Risk management and insurance.-- ed.6. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)WILLIAMS, C.Arthur, agus Richard M. HEINS. Risk Management and Insurance.-- Ed.6. New York: McGraw-Hill, 1989.
Lua MLA (9ú heag.)WILLIAMS, C.Arthur, agus Richard M. HEINS. Risk Management and Insurance.-- Ed.6. McGraw-Hill, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.