Cita APA (7th ed.)

Biggs, D. C., Bol, M. A., & Baker, J. (2009). Guidebook for Conducting Airport User Surveys. Transportation Research Board.

Cita Chicago (17th ed.)

Biggs, D. C., M. A. Bol, i J. Baker. Guidebook for Conducting Airport User Surveys. Washington, D.C.: Transportation Research Board, 2009.

Cita MLA (9th ed.)

Biggs, D. C., et al. Guidebook for Conducting Airport User Surveys. Transportation Research Board, 2009.