Simpson, A. H. R. W., Unwin, P. S., & Nelson, I. W. (1988). Head injuries, helmets, cycle lanes, and cyclists.
Čikaški stil citiranjaSimpson, A H R W., P S. Unwin, i I W. Nelson. Head Injuries, Helmets, Cycle Lanes, and Cyclists. 1988.
MLA način citiranjaSimpson, A H R W., P S. Unwin, i I W. Nelson. Head Injuries, Helmets, Cycle Lanes, and Cyclists. 1988.
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