@book{lewisethnologue2016,
  address   = {Dallas, Texas},
  edition   = {Online version},
  editor    = {Lewis, M. Paul and Simons, Gary F. and Fennig, Charles D.},
  note      = {00000},
  publisher = {SIL International},
  title     = {Ethnologue: Languages of the World, Nineteenth edition},
  url       = {http://www.ethnologue.com},
  year      = {2016}
}