Biggs, D. C., Bol, M. A., & Baker, J. (2009). Guidebook for Conducting Airport User Surveys. Transportation Research Board.
Citace podle Chicago (17th ed.)Biggs, D. C., M. A. Bol, a J. Baker. Guidebook for Conducting Airport User Surveys. Washington, D.C.: Transportation Research Board, 2009.
Citace podle MLA (9th ed.)Biggs, D. C., et al. Guidebook for Conducting Airport User Surveys. Transportation Research Board, 2009.
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