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
American Management Association. Research and Development Division,Maintaining the product portfolio : the commercial development concept,,"Research and Development Division, American Management Association",1960,AMA management reports,,,,https://cir.nii.ac.jp/crid/1130000794783904256