Dailey, S. W., & Barsan, W. G. (1992). Head injuries in Soccer: A case for protective headgear? The physician and sportsmedicine, 20(8), S. 79-85. doi:10.1080/00913847.1992.11947468

Dailey, Stephen W., and William G. Barsan. "Head Injuries in Soccer: A Case for Protective Headgear?" The Physician and Sportsmedicine 20, no. 8 (1992): S. 79-85.

Dailey, Stephen W., and William G. Barsan. "Head Injuries in Soccer: A Case for Protective Headgear?" The Physician and Sportsmedicine 20.8 (1992): S. 79-85.