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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Boyd, 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Boyd, 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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.