Williams, B. E. Voices of the pioneers. Spokane Public Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilliams, Bertha Engelland. Voices of the Pioneers. [Spokane, WA: Spokane Public Library.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWilliams, Bertha Engelland. Voices of the Pioneers. Spokane Public Library.
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