Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Schieffer, Rudolf",Die Karolinger,"5., aktualisierte Aufl",Verlag W. Kohlhammer,2014,Kohlhammer Urban-Taschenbücher,,9783170233836,,https://cir.nii.ac.jp/crid/1130282270376832000