APA (7th ed.) Zitazioa

Williams, C. A., & .Heins, R. M. (1981). Risk management and insurance (4th ed.). McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

Williams, C. Arthur, eta Richard M. .Heins. Risk Management and Insurance. 4th ed. New York: McGraw-Hill, 1981.

MLA (9th ed.) Zitazioa

Williams, C. Arthur, eta Richard M. .Heins. Risk Management and Insurance. 4th ed. McGraw-Hill, 1981.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.