Bibliography

Bibliography of Vitality:
Constenla Umaña, Adolfo. 2012. Chibchan Languages. Languages of South America: A Comprehensive Guide, ed. by Lyle Campbell and Verónica Grondona, 391-439. Berlin: Mouton de Gruyter.
Bibliography of Locations:
2005. "The World Atlas of Language Structures." edited by Bernard Comrie et al. Oxford University Press.
Bibliography of Context:
Lewis, M. Paul (ed.). 2009. Ethnologue: Languages of the World, 16 edn. http://www.ethnologue.com/home.asp. (15 February, 2011.)