{"source":"book","style":"apa","contributors": [{"function":"author","last":"Walker","first":"Oscar"},{"function":"author","last":"Marquez","first":"Maria","middle":"Luisa"},{"function":"author","last":"Espinosa","first":"Graciela"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"El sistema de acentuacion grafica de la lengua espanola","publisher":"Universidad Autonoma de Puebla","city":"Puebla, Pue. [Mexico]","year":"1987"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"21565298"}