Ethnologue: Languages of the World, 17th Edition (2013) . (2013) · edited by Paul M. Lewis; Gary F. Simons; and Charles D. Fennig · Dallas, Texas: SIL International http://www.ethnologue.com Ethnologue: Languages of the World, 17th Edition (2013)

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) ·