Cita APA (7th ed.)

Pegrum, D. F. (1968). Transportation: Economics and public policy (Rev. ed.). R. D. Irwin.

Cita Chicago (17th ed.)

Pegrum, Dudley Frank. Transportation: Economics and Public Policy. Rev. ed. Homewood, Ill.: R. D. Irwin, 1968.

Cita MLA (8th ed.)

Pegrum, Dudley Frank. Transportation: Economics and Public Policy. Rev. ed. R. D. Irwin, 1968.