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
Jón Viðar Sigurðsson,Chieftains and power in the Icelandic commonwealth,,Odense University Press,1999,The Viking collection,,8778380561,,https://cir.nii.ac.jp/crid/1130000793680397568