Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Berceo, Gonzalo de, 13th cent. and Dutton, Brian and Alarcos Llorach, Emilio and Uría Maqua, Isabel",Obra completa,,Espasa-Calpe,1992,Clásicos castellanos,,8423935310,,https://cir.nii.ac.jp/crid/1130282273191103104