Simons, Gary F. and Fennig, Charles D. (eds.) 2019. Ethnologue: Languages of the World. 22nd edn. Dallas, Texas: SIL International.
@misc{ethnologueonline,
address = {Dallas, Texas},
edition = {22},
editor = {Simons, Gary F. and Fennig, Charles D.},
publisher = {SIL International},
title = {Ethnologue: Languages of the World},
url = {http://www.ethnologue.com},
year = {2019}
}