著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Cywyddwyr and Rowlands, Eurys I.","Poems of the cywyddwyr : a selection of Cywyddau, c. 1375-1525",,Dublin Institute for Advanced Studies,1976,Mediaeval and modern Welsh series,,,,https://cir.nii.ac.jp/crid/1130000797708995072