APA-ийн эшлэл(7 дахь хэвлэлт)

Carlos, A. M., & Lewis, F. D. (2010). Commerce by a frozen sea: Native Americans and the European fur trade. University of Pennsylvania Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Carlos, Ann M., ба Frank D. Lewis. Commerce by a Frozen Sea: Native Americans and the European Fur Trade. Philadelphia: University of Pennsylvania Press, 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Carlos, Ann M., ба Frank D. Lewis. Commerce by a Frozen Sea: Native Americans and the European Fur Trade. University of Pennsylvania Press, 2010.