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
"Martens, George R.",African trade unionism : a bibliography : with a guide to trade union organizations and publications,,G. K. Hall,1977,Bibliographies and guides in African studies,,0816180733,,https://cir.nii.ac.jp/crid/1130282270341132416