APA (7 वां संस्करण) प्रशस्ति पत्र

Pegrum, D. F. (1963). Transportation: Economics and public policy. Irwin.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Pegrum, Dudley Frank. Transportation: Economics and Public Policy. Homewood, Ill: Irwin, 1963.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Pegrum, Dudley Frank. Transportation: Economics and Public Policy. Irwin, 1963.