@book{sStarkNgigua,
  author    = {Stark Campbell, Sharon and Luna Villanueva, Verónica},
  edition   = {4},
  pages     = {104},
  publisher = {Mexico, D.F.: Instituto Lingüístico de Verano},
  title     = {Gramática del Ngigua de San Marcos Tlacoyalco},
  year      = {2011}
}