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
"Conrad, David C.","Empires of medieval West Africa : Ghana, Mali, and Songhay",,Facts On File,2005,Great empires of the past,,0816055629,,https://cir.nii.ac.jp/crid/1130282272939891712