Boyd, R. T. (1999). The coming of the spirit of pestilence: Introduced infectious diseases and population decline among Northwest Coast Indians, 1774-1874. UBC Press ; University of Washington Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBoyd, Robert T. The Coming of the Spirit of Pestilence: Introduced Infectious Diseases and Population Decline Among Northwest Coast Indians, 1774-1874. Vancouver : Seattle: UBC Press ; University of Washington Press, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBoyd, Robert T. The Coming of the Spirit of Pestilence: Introduced Infectious Diseases and Population Decline Among Northwest Coast Indians, 1774-1874. UBC Press ; University of Washington Press, 1999.
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