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
"Van Os, Leonard W., d. 1927 and Van Os, Hendrik Johan Leonard",Afrikaans self taught : by the natural method with phonetic pronunciation,,Marlborough,1930,Marlborough's self-taught series,,,,https://cir.nii.ac.jp/crid/1130282273325684480