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 National Research Council (U.S.). Transportation Research Board,Truck and bus safety : roundabouts,,Transportation Research Board of the National Academies,2014,Transportation research record,,"9780309294959,9780309295819,9780309370035",,https://cir.nii.ac.jp/crid/1130282272380494848