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
"Wilks, Ivor",Wa and the Wala : Islam and polity in northwestern Ghana,,Cambridge University Press,1989,African studies series,,0521362105,,https://cir.nii.ac.jp/crid/1130000798043787136