Reference: Campbell and Grondona 2012

Campbell, Lyle & Verónica Grondona. 2012. The Indigenous Languages of South America: A Comprehensive Guide. (The World of Linguistics, 2.) De Gruyter Mouton.

@book{campbellgrondona2012southamerica,
  author    = {Campbell, Lyle and Grondona, Verónica},
  publisher = {De Gruyter Mouton},
  series    = {The World of Linguistics},
  title     = {The Indigenous Languages of South America: A Comprehensive Guide},
  volume    = {2},
  year      = {2012}
}