Thompson, David (1971). "Life with the Nahathaways". Travels in western North America, 1784–1812. Macmillan of Canada. p. 109. ISBN9780770512125. The French Canadians...call them 'Krees', a name which none of the Indians can pronounce...
Greeberg, Adolph M.; Morrison, James (1982). "Group Identities in the Boreal Forest: The Origin of the Northern Ojibwa". Ethnohistory. 29 (2): 75–102. doi:10.2307/481370. JSTOR481370.
ethnologue.com
"Languages of Canada". Ethnologue: Languages of the World. Retrieved 21 September 2008. Note: The western group of languages includes Swampy Cree, Woods Cree and Plains Cree. The eastern language is called Moose Cree.
firstpeoplesofcanada.com
"The Métis". Canada's First People. Retrieved 27 October 2019.
Greeberg, Adolph M.; Morrison, James (1982). "Group Identities in the Boreal Forest: The Origin of the Northern Ojibwa". Ethnohistory. 29 (2): 75–102. doi:10.2307/481370. JSTOR481370.