Tollefson, G. (1987). BPA and the struggle for power at cost. Bonneville Power Administration.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTollefson, Gene. BPA and the Struggle for Power at Cost. Portland, Or.: Bonneville Power Administration, 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTollefson, Gene. BPA and the Struggle for Power at Cost. Bonneville Power Administration, 1987.
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