Reference: Koehn and Koehn 1986

Koehn, Edward & Sally Koehn. 1986. Apalai. In Desmond C. Derbyshire and Geoffrey K. Pullum (eds.), Handbook of Amazonian Languages, 33–127. Berlin: De Gruyter Mouton.

http://www.degruyter.com/view/books/9783110850819/9783110850819.33/9783110850819.33.xml

@incollection{koehn1986apalai,
  address   = {Berlin},
  author    = {Edward Koehn and Sally Koehn},
  booktitle = {Handbook of Amazonian Languages},
  editor    = {Desmond C. Derbyshire and Geoffrey K. Pullum},
  pages     = {33–127},
  publisher = {De Gruyter Mouton},
  title     = {Apalai},
  url       = {http://www.degruyter.com/view/books/9783110850819/9783110850819.33/9783110850819.33.xml},
  volume    = {I},
  year      = {1986}
}