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
"De Klerk, Vivian",Focus on South Africa,,J. Benjamins Pub. Co.,1996,Varieties of English around the world,,"9027248737,1556194463",,https://cir.nii.ac.jp/crid/1130000796467282560