WILLIAMS, C. A. (1989). Risk Management And Insurance C. Arthur Williams And Richard M. Heins. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWILLIAMS, C. Arthur. Risk Management And Insurance C. Arthur Williams And Richard M. Heins. McGraw-Hill, 1989.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWILLIAMS, C. Arthur. Risk Management And Insurance C. Arthur Williams And Richard M. Heins. McGraw-Hill, 1989.
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