Focas, C. (1994). Fares compared: An international comparison of public transport fares. London Research Centre.
Cita Chicago (17th ed.)Focas, C. Fares Compared: An International Comparison of Public Transport Fares. London Research Centre, 1994.
Cita MLA (9th ed.)Focas, C. Fares Compared: An International Comparison of Public Transport Fares. London Research Centre, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.