Inland Empire Railway Historical Society. (1974). Yardbull newsletter. Inland Empire Railway Historical Society.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInland Empire Railway Historical Society. Yardbull Newsletter. [Spokane, Wash.]: Inland Empire Railway Historical Society, 1974.
एमएलए (8वां संस्करण) प्रशस्ति पत्रInland Empire Railway Historical Society. Yardbull Newsletter. Inland Empire Railway Historical Society, 1974.
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