Pegrum, D. F. (1963). Transportation: Economics and public policy. Irwin.
Chicagoスタイル(17版)引用形式Pegrum, Dudley Frank. Transportation: Economics and Public Policy. Homewood, Ill: Irwin, 1963.
MLA(9版)引用形式Pegrum, Dudley Frank. Transportation: Economics and Public Policy. Irwin, 1963.
警告: この引用は必ずしも正確ではありません.