Pegrum, D. F. (1968). Transportation: Economics and public policy (Rev. ed.). R. D. Irwin.
芝加哥风格引文Pegrum, Dudley Frank. Transportation: Economics and Public Policy. Rev. ed. Homewood, Ill.: R. D. Irwin, 1968.
MLA引文Pegrum, Dudley Frank. Transportation: Economics and Public Policy. Rev. ed. R. D. Irwin, 1968.
警告：这些引文格式不一定是100％准确.