Não informado. Transport economics. Interstate Commerce Commission, Bureau of Transport Economics and Statistics.
Chicagoスタイル(17版)引用形式Não informado. Transport Economics. Washington: Interstate Commerce Commission, Bureau of Transport Economics and Statistics.
MLA(8版)引用形式Não informado. Transport Economics. Interstate Commerce Commission, Bureau of Transport Economics and Statistics.
警告: この引用は必ずしも正確ではありません.