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) ·

South America ( pp. 103-196 ) . Mily Crevels (2007) · In Atlas of the World's Endangered Languages edited by C. Moseley · London & New York: Routledge

Language endangerment in South America: The clock is ticking ( pp. 167-234 ) . Crevels, Mily (2012) · In The Indigenous Languages of South America: A Comprehensive Guide edited by Lyle Campbell and Veronica Grondona · Mouton de Gruyter

LL-MAP (Language and Location: A Map Accessibility Project) . Anthony Aristar and Helen Aristar-Dry and Yichun Xie (2012) · http://llmap.org

Roucouyenne, Arrouague, Piapoco et d'autres langues de la région des Guyanes . J. Crevaux and P. Sagot and L. Adam (1882) · Bibliothèque Linguistique Américaine · Vol. VIII · Librairie-Éditeur J. Maisonneuve, Paris

Yavitero ( pp. 594-691 ) . Emilio Esteban Mosonyi and Jorge C. Mosonyi and Águeda Largo (2000) · In Manual de Lenguas Indígenas de Venezuela Serie Origenes · edited by Mosonyi, Esteban Emilo and Jorge Carlos Mosonyi · Caracas: Fundación Bigott