Hauer, E. (1997). Observational before - after studies in road safety: Estimating the effect of highway and traffic engineering measures on road safety. Pergamon.
Chicago-Zitierstil (17. Ausg.)Hauer, Ezra. Observational Before - After Studies in Road Safety: Estimating the Effect of Highway and Traffic Engineering Measures on Road Safety. Oxford: Pergamon, 1997.
MLA-Zitierstil (9. Ausg.)Hauer, Ezra. Observational Before - After Studies in Road Safety: Estimating the Effect of Highway and Traffic Engineering Measures on Road Safety. Pergamon, 1997.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.