Williams Jr., C. A. (1995). Risk management and insurance.: 7th ed. McGraw-Hill.
Chicago Style (17th ed.) ZitazioaWilliams Jr., C. Arthur. Risk Management and Insurance.: 7th Ed. New York: McGraw-Hill, 1995.
MLA (9th ed.) ZitazioaWilliams Jr., C. Arthur. Risk Management and Insurance.: 7th Ed. McGraw-Hill, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.