Washington Water Power Company. (1964). The Washington Water Power Company, 1889-1964: 75 years of service to Spokane and the Inland Empire. Spokesman-Review.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington Water Power Company. The Washington Water Power Company, 1889-1964: 75 Years of Service to Spokane and the Inland Empire. [Spokane: Spokesman-Review, 1964.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington Water Power Company. The Washington Water Power Company, 1889-1964: 75 Years of Service to Spokane and the Inland Empire. Spokesman-Review, 1964.
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