Παραπομπή APA
Williams, C. A., & Heins, R. M. (1985). Risk management and insurance (5th ed.). New York: McGraw-Hill.
Παραπομπή Chicago StyleWilliams, Chester Arthur, and Richard M. Heins. Risk Management and Insurance. 5th ed. New York: McGraw-Hill, 1985.
Παραπομπή MLAWilliams, Chester Arthur, and Richard M. Heins. Risk Management and Insurance. 5th ed. New York: McGraw-Hill, 1985.
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