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
"Polak, Emil J.","Medieval and Renaissance letter treatises and form letters : a census of manuscripts found in part of Western Europe, Japan, and the United States of America",,E.J. Brill,1994,Davis medieval texts and studies,,9004099158,,https://cir.nii.ac.jp/crid/1130000795681933568