Clark, Lawrence E. 1995. Vocabulario Popoluca De Sayula. (Serie de vocabularios y diccionarios inde'igenas.) 104th edn. Summer Institute of Linguistics.
@book{pos_clark1995, author = {Clark, Lawrence E.}, edition = {104}, publisher = {Summer Institute of Linguistics}, series = {Serie de vocabularios y diccionarios inde'igenas}, title = {Vocabulario Popoluca De Sayula}, year = {1995} }