Lewis and Paul, M. and Simons, Gary F. and and Fennig, Charles D. (eds.) 2015. Ethnologue: Languages of the World, 18th Edition. 18th edn. Dallas, Texas: SIL International.
@book{661206, address = {Dallas, Texas}, edition = {18th}, editor = {Lewis and Paul, M. and Simons, Gary F. and and Fennig, Charles D.}, publisher = {SIL International}, title = {Ethnologue: Languages of the World, 18th Edition}, url = {http://www.ethnologue.com}, year = {2015}, hhtype = {comparative (computerized assignment from "languages")}, inlg = {English [eng]}, local_ids = {98650}, src = {elcat} }