Thompson, D. C., Thompson, R. S., Rivara, F. P., & Wolf, M. E. (1990). A case-control study of the effectiveness of bicycle safety helmets in preventing facial injury.
Chicago-stil citatThompson, D C., R S. Thompson, F P. Rivara, och M E. Wolf. A Case-control Study of the Effectiveness of Bicycle Safety Helmets in Preventing Facial Injury. 1990.
MLA-referensThompson, D C., R S. Thompson, F P. Rivara, och M E. Wolf. A Case-control Study of the Effectiveness of Bicycle Safety Helmets in Preventing Facial Injury. 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.