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 and Committee for a study of contracting out transit services,Contracting for bus and demand-responsive transit services : a survey of U.S. practice and experience,,National Academy Press,2001,Special report,,0309072050,,https://cir.nii.ac.jp/crid/1130000798380849792