Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Conant, Kenneth John","Carolingian and Romanesque architecture, 800 to 1200",2nd integrated ed. (rev.),Penguin,1978,The Pelican history of art,,0140561137,,https://cir.nii.ac.jp/crid/1130282273072605312