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
"Keegan, Desmond",Theoretical principles of distance education,,Routledge,2016,Routledge studies in distance education,,9781138990203,,https://cir.nii.ac.jp/crid/1130000797144804096