APA

Simons D., Gillies N., . (1977). Guards on trucks to prevent car under-ride. New South Wales: Traffic Accident Research Unit nr 6/77.

Chicago

Simons DA, Gillies N, . 1977. Guards on trucks to prevent car under-ride. New South Wales: Traffic Accident Research Unit nr 6/77.

Harvard

Simons D., Gillies N., . (1977). Guards on trucks to prevent car under-ride. New South Wales: Traffic Accident Research Unit nr 6/77.

MLA

Simons DA, Gillies N, . Guards on trucks to prevent car under-ride. New South Wales: Traffic Accident Research Unit nr 6/77. 1977.