Schaller, B. (2005). On-board and intercept transit survey techniques. Transportation Research Board.
Citace podle Chicago (17th ed.)Schaller, Bruce. On-board and Intercept Transit Survey Techniques. Washington, D.C: Transportation Research Board, 2005.
Citace podle MLA (9th ed.)Schaller, Bruce. On-board and Intercept Transit Survey Techniques. Transportation Research Board, 2005.
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