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
"Girvan, Ritchie and Bruce-Mitford, Rupert Leo Scott",Beowulf and the seventh century : language and content,[1st ed.] reissued / with a new chapter by Rupert Bruce-Mitford,Methuen,1971,University paperbacks,,,,https://cir.nii.ac.jp/crid/1130282271742472448