Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Pegg, Mark Gregory",A most holy war : the Albigensian crusade and the battle for Christendom,,Oxford University Press,2008,Pivotal moments in world history,,"9780195171310,9780195393101",,https://cir.nii.ac.jp/crid/1130282271134927232