R.L. Polk & Co. Market Research Division. Consumer analysis of the Spokane market. Spokesman-Review, Spokane Daily Chronicle.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रR.L. Polk & Co. Market Research Division. Consumer Analysis of the Spokane Market. Spokane, Wash.: Spokesman-Review, Spokane Daily Chronicle.
एमएलए (8वां संस्करण) प्रशस्ति पत्रR.L. Polk & Co. Market Research Division. Consumer Analysis of the Spokane Market. Spokesman-Review, Spokane Daily Chronicle.
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