Button, K. J., & Stough, R. (1998). Transport policy. Edward Elgar Pub.
Cita Chicago (17th ed.)Button, Kenneth John, i Roger Stough. Transport Policy. Cheltenham, UK: Edward Elgar Pub, 1998.
Cita MLA (9th ed.)Button, Kenneth John, i Roger Stough. Transport Policy. Edward Elgar Pub, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.