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 "Skinner, Patricia","Family power in southern Italy : the duchy of Gaeta and its neighbours, 850-1139",,Cambridge University Press,2002,Cambridge studies in medieval life and thought,,0521522056,,https://cir.nii.ac.jp/crid/1130282272582080768