Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Lapesa, Rafael and Menéndez Pidal, Ramón",Historia de la lengua española,9a ed. corregida y aumentada,Gredos,1981,Biblioteca románica hispánica,,"8424900723,8424900731",,https://cir.nii.ac.jp/crid/1130000797540487936