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
"Ek, Jan Ate van and Alexander, L. G. and Council of Europe",Threshold level English : in a European unit/credit system for modern language learning by adults,,Published for and on behalf of the Council of Europe by Pergamon Press,1980,Council of Europe modern languages project,,0080245889,,https://cir.nii.ac.jp/crid/1130000796900171648