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
"Okpaku, Joseph",Nigeria: dilemma of nationhood : an African analysis of the Biafran conflict,,"Third Press,Greenwood",1972,Contributions in Afro-American and African studies,,0837146682,,https://cir.nii.ac.jp/crid/1130000797476650496