Campbell and Poser 2008

Campbell, Lyle and Poser, William J. 2008. Language Classification, history and method. Cambridge University Press.

@book{jacquesestimative-campbellposer08,
  author    = {Campbell, Lyle and Poser, William J.},
  publisher = {Cambridge University Press},
  title     = {Language Classification, history and method},
  year      = {2008}
}