Dyfyniad APA

Huijbers, J. J. W. (1990). Utilisation of security helmets for two-wheeled vehicle riders. Institute for Road Safety Research SWOV, The Netherlands.

Dyfyniad Arddull Chicago

Huijbers, J. J. W. Utilisation of Security Helmets for Two-wheeled Vehicle Riders. Leidschendam: Institute for Road Safety Research SWOV, The Netherlands, 1990.

Dyfyniad MLA

Huijbers, J. J. W. Utilisation of Security Helmets for Two-wheeled Vehicle Riders. Institute for Road Safety Research SWOV, The Netherlands, 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.