Παραπομπή APA

Hauer, E. (1997). Observational before-after studies in road safety: : estimating the effect of hifhway and traffic engineering measures on road safety. Oxford: Pergamon.

Παραπομπή Chicago Style

Hauer, Ezra. Observational Before-after Studies in Road Safety: : Estimating the Effect of Hifhway and Traffic Engineering Measures On Road Safety. Oxford: Pergamon, 1997.

Παραπομπή MLA

Hauer, Ezra. Observational Before-after Studies in Road Safety: : Estimating the Effect of Hifhway and Traffic Engineering Measures On Road Safety. Oxford: Pergamon, 1997.

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