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
"Tritton, A. S. (Arthur Stanley)",The caliphs and their non-Muslim subjects : a critical study of the Covenant of ʿUmar,,F. Cass,1970,Islam and the Muslim world,,0714619965,,https://cir.nii.ac.jp/crid/1130282270639938176