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

Dokumentation Bedrohter Sprachen (DoBeS) . Dokumentation Bedrohter Sprachen http://lux09.mpi.nl:8186/DOBES/

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

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

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

First Peoples' Language Map of British Columbia . (2012) · http://www.maps.fphlcc.ca/

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) ·

Beaver Texts, Beaver Dialect ( pp. 295-397, 399-553 ) . P. E. Goddard (1917) · Anthropological Papers of the American Museum of Natural History. X (V, VI) ·

The Phonology and Morphology of Halfway River Beaver . Tiina Randoja (1989) ·