Schaller, B. (2005). On-board and intercept transit survey techniques. Transportation Research Board.
Citación estilo ChicagoSchaller, Bruce. On-board and Intercept Transit Survey Techniques. Washington, D.C: Transportation Research Board, 2005.
Cita MLASchaller, Bruce. On-board and Intercept Transit Survey Techniques. Transportation Research Board, 2005.
Warning: These citations may not always be 100% accurate.