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
"Law, Robin","The Ọyọ Empire, c.1600-c.1836 : a West African imperialism in the era of the Atlantic slave trade",,Clarendon Press,1977,Oxford studies in African affairs,,0198227094,,https://cir.nii.ac.jp/crid/1130282268641295744