@techreport{oai:ir.ide.go.jp:00033093,
 author = {Hartono, Sunaryati and Setiawan and Soenandar, Taryana},
 month = {},
 note = {application/pdf, IAL001000_008, AHIO/347.4/I1},
 title = {Chapter 4 The UNIDROIT Principles of International Commercial Contracts},
 year = {2001}
}