Billington, K. (1988). People, politics & public power. Washington Public Utility Districts' Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBillington, Ken. People, Politics & Public Power. Seattle, Wash.: Washington Public Utility Districts' Association, 1988.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBillington, Ken. People, Politics & Public Power. Washington Public Utility Districts' Association, 1988.
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