Widder, K. R. (1999). Battle for the soul: Métis children encounter evangelical Protestants at Mackinaw Mission, 1823-1837. Michigan State University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWidder, Keith R. Battle for the Soul: Métis Children Encounter Evangelical Protestants at Mackinaw Mission, 1823-1837. East Lansing, Mich.: Michigan State University Press, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWidder, Keith R. Battle for the Soul: Métis Children Encounter Evangelical Protestants at Mackinaw Mission, 1823-1837. Michigan State University Press, 1999.
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