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
"Dike, K. Onwuka (Kenneth Onwuka)","Trade and politics in the Niger Delta, 1830-1885 : an introduction to the economic and political history of Nigeria",,Clarendon Press,1956,Oxford studies in African affairs,,,,https://cir.nii.ac.jp/crid/1130000795230546432