APA

Böcher W., . (1977). System approach for traffic safety. : WHO. European Technical Advisory Committee on the Prevention of Road Traffic Accident, Copenhagen, Nov 1977.

Chicago

Böcher W, . 1977. System approach for traffic safety. : WHO. European Technical Advisory Committee on the Prevention of Road Traffic Accident, Copenhagen, Nov 1977.

Harvard

Böcher W., . (1977). System approach for traffic safety. : WHO. European Technical Advisory Committee on the Prevention of Road Traffic Accident, Copenhagen, Nov 1977.

MLA

Böcher W, . System approach for traffic safety. : WHO. European Technical Advisory Committee on the Prevention of Road Traffic Accident, Copenhagen, Nov 1977. 1977.