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 "Bethge, Jan Per","Sustainability certification : comparative analysis of different approaches, their implementation and impacts using the examples of Fairtrade and Rainforest Alliance in the cocoa sector of Ghana",,Lit,2014,Neue Kölner Genossenschaftswissenschaft,,9783643903969,,https://cir.nii.ac.jp/crid/1130282273130140544