{"source":"book","style":"apa","contributors": [{"function":"author","last":"Butterfield","first":"Jeremy"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"Collins : guia de conversacion ingles","publisher":"Random House Mondadori","city":"Barcelona","year":"2006"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"159959752","isbn":"8425335167 9788425335167"}