Cita APA (7a ed.)

Sabey, B. E., & Johnson, H. D. (1973). Roadlighting and accidents: Before and after studies on trunk road sites. Transport and Road Research Laboratory.

Cita Chicago Style (17a ed.)

Sabey, Barbara E., y H. D. Johnson. Roadlighting and Accidents: Before and After Studies on Trunk Road Sites. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1973.

Cita MLA (9a ed.)

Sabey, Barbara E., y H. D. Johnson. Roadlighting and Accidents: Before and After Studies on Trunk Road Sites. Transport and Road Research Laboratory, 1973.