Evans, G. W. (1912). The coal fields of King County. E.L. Boardman, Public Printer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEvans, George Watkin. The Coal Fields of King County. Olympia, Wash.: E.L. Boardman, Public Printer, 1912.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEvans, George Watkin. The Coal Fields of King County. E.L. Boardman, Public Printer, 1912.
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