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
"Oriji, John Nwachimereze",Ngwa history : a study of social and economic changes in Igbo mini-states in time perspective,,P. Lang,1998,American university studies,,0820440426,,https://cir.nii.ac.jp/crid/1130000796040003456