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
"Sawyer, Birgit and Sawyer, P. H.","Medieval Scandinavia : from conversion to Reformation, circa 800-1500",,University of Minnesota Press,1993,The Nordic series,,"0816617384,0816617392",,https://cir.nii.ac.jp/crid/1130000797986879488