Layfield, R. E. (1981). Demand for bus travel: The effects of service and fare changes in Gosport and Fareham. Transport and Road Research Laboratory.
Cita Chicago (17th ed.)Layfield, R. E. Demand for Bus Travel: The Effects of Service and Fare Changes in Gosport and Fareham. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1981.
Cita MLA (9th ed.)Layfield, R. E. Demand for Bus Travel: The Effects of Service and Fare Changes in Gosport and Fareham. Transport and Road Research Laboratory, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.