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
"Löfgren, Horst","The measurement of language proficiency : an analysis of the structure of language proficiency, and application of the research results in a comparison of the effects on learning of different study materials in the German language. A summary",,Gleerup,1972,Studia psychologica et paedagogica. Series altera : Investigationes,,,,https://cir.nii.ac.jp/crid/1130000794761988608