Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Hildegard, Saint and Sequentia (Musical group) and Thornton, Barbara and Köper, Carmen-Renate and Mockridge, William",Ordo virtutum : Spiel der Kräfte,,"Deutsche Harmonia Mundi,BMG Victor [distributor]",1990,Editio classica,,,,https://cir.nii.ac.jp/crid/1130282271667417344