Não informado. (2000). University of Colorado studies. University of Colorado Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. University of Colorado Studies. Boulder, Colo: University of Colorado Press, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. University of Colorado Studies. University of Colorado Press, 2000.
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