APA aipamena

Pegrum, D. F. (1973). Transportation: Economics and public policy (3d ed.). R. D. Irwin.

Chicago Style aipamena

Pegrum, Dudley Frank. Transportation: Economics and Public Policy. 3d ed. Homewood, Ill.: R. D. Irwin, 1973.

MLA aipamena

Pegrum, Dudley Frank. Transportation: Economics and Public Policy. 3d ed. R. D. Irwin, 1973.