@misc{
title = {English foreign language for 3 and 4 years old children},
author = {},
editor = {Artigal Josep Maria},
editor = {Gubianas, Valenti},
editor = {Mas, Xaro},
editor = {Tit. dal cofanetto },
editor = {Nome degli A. dal verso del quaderno },
year = {2004},
address = {Barcelona },
publisher = {Artigal},
}