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
"Staubach, Peter G","The rule of unwritten international law : customary law, general principles, and world order",,Routledge,2018,Routledge research in international law,,9780815382911,,https://cir.nii.ac.jp/crid/1130000796100731392