Northern Pacific Railway Company. (1915). Spokane and the Inland Empire. Northern Pacific Railway Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNorthern Pacific Railway Company. Spokane and the Inland Empire. [Saint Paul? Minn.]: Northern Pacific Railway Company, 1915.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNorthern Pacific Railway Company. Spokane and the Inland Empire. Northern Pacific Railway Company, 1915.
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