Tolong jelaskan mengenai Catatan dari Rumpun bahasa Arapahoa

Goddard, Ives (2001). "The Algonquian Languages of the Plains." In Plains, Part I, ed. Raymond J. DeMallie. Vol. 13 of Handbook of North American Indians, ed. William C. Sturtevant. Washington, D.C.: Smithsonian Institution, pp. 71–79.

Marianne Mithun (1999). The Languages of Native North America. Cambridge Language Surveys. Cambridge: Cambridge University Press.