Thompson, David (1971): "Life with the Nahathaways, Travels in western North America, 1784–1812. Macmillan of Canada. ISBN 9780770512125; s. 109. Sitat: «The French Canadians...call them 'Krees', a name which none of the Indians can pronounce ...»
Honigmann, John J. (1981): «West Main Cree», Helm, June; Sturtevant, William C.: Handbook of North American Indians. Bind 6: Subarctic. Washington, D.C.: Smithsonian. ISBN 978-0-16-004578-3; s. 227. «David H. Pentland, "Synonymy"»
