APA (7th ed.) Citation

Webster, D. C., & Layfield, R. E. (1998). Traffic calming: Sinusoidal, 'H' and 'S' humps. Transport Research Laboratory.

Chicago Style (17th ed.) Citation

Webster, David C., and R. E. Layfield. Traffic Calming: Sinusoidal, 'H' and 'S' Humps. Crowthorne, Berkshire: Transport Research Laboratory, 1998.

MLA (9th ed.) Citation

Webster, David C., and R. E. Layfield. Traffic Calming: Sinusoidal, 'H' and 'S' Humps. Transport Research Laboratory, 1998.