Endangered Languages Catalogue Project. Compiled by research teams at University of Hawai'i Mānoa and Institute for Language Information and Technology (LINGUIST List) at Eastern Michigan University . (2012) ·

Ethnologue: Languages of the World, 16th Edition (2009) . (2009) · edited by M. Paul Lewis · SIL International http://www.ethnologue.com/

Atlas of the World’s Languages in Danger . Christopher Moseley (ed.) (2010) · UNESCO Publishing http://www.unesco.org/culture/en/endangeredlanguages/atlas

World Oral Literature Project . http://www.oralliterature.org

Encyclopedia of the World's Endangered Languages . Christopher Moseley (2007) · Routledge

Endangered Languages of the United States ( pp. 108-130 ) . Christopher Rogers, Naomi Palosaari and Lyle Campbell (2010) · In Atlas of the World’s Languages in Danger of Disappearing edited by Christopher Moseley · UNESCO

The World Atlas of Language Structures . (2005) · edited by Bernard Comrie and David Gil and Martin Haspelmath and Matthew S. Dryer · Oxford University Press

North America ( pp. 7-41 ) . Victor Golla and Ives Goddard and Lyle Campbell and Marianne Mithun and Mauricio Mixco (2008) · In Atlas of the World's Languages edited by Chris Moseley and Ron Asher · Routledge

The Arapaho language ( pp. xvii+519 ) . Andrew Cowell and Moss, Sr., Alonzo (2008) · Boulder: University Press of Colorado

Transitivity in Arapaho: A Construction Grammar Approach . Hartwell S. Francis (2006) ·

Arapaho . Zdeněk Salzmann (1956-1967) · International Journal of American Linguistics.

Arapaho I: Phonology ( pp. 49-56 ) . Salzmann, Zdenek (1956) · International Journal of American Linguistics. 22 (1) ·

Arapaho VII: Verb ( pp. 209-223 ) . Salzmann, Zdenek (1967) · International Journal of American Linguistics. 33