Jackson, R. L., & Coe, G. A. (1980). The Northampton taxi study. Transport and Road Research Laboratory.
Cita Chicago (17th ed.)Jackson, R. L., i G. A. Coe. The Northampton Taxi Study. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1980.
Cita MLA (9th ed.)Jackson, R. L., i G. A. Coe. The Northampton Taxi Study. Transport and Road Research Laboratory, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.