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
"Gregorius, Magister and Osborne, John",The marvels of Rome,,Pontifical Institute of Mediaeval Studies,1987,Mediaeval sources in translation,,0888442815,,https://cir.nii.ac.jp/crid/1130282269138120832