Keatinge, R. (1997). Cyclists should wear helmets. Better to control the demand for fast cars.
Παραπομπή Chicago StyleKeatinge, R. Cyclists Should Wear Helmets. Better to Control the Demand for Fast Cars. 1997.
Παραπομπή MLAKeatinge, R. Cyclists Should Wear Helmets. Better to Control the Demand for Fast Cars. 1997.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.