@book{
title = {Guía didáctica},
author = {},
editor = {Castro Viudez, Francisca},
editor = {998026857108896 - Nuevo Español en marcha -  },
editor = {In calce al front.: Ele, Español lengua extranjera },
year = {2014},
address = {Alcobendas },
publisher = {SGEL},
}