APA

Summala H., . (1986). Risk control is not risk adjustment; The zero-risk theory of driver behavior and its implications. Helsingfors: Helsingin Yliopisto. Liikennetutkimusyksikkö.

Chicago

Summala Heikki, . 1986. Risk control is not risk adjustment; The zero-risk theory of driver behavior and its implications. Helsingfors: Helsingin Yliopisto. Liikennetutkimusyksikkö.

Harvard

Summala H., . (1986). Risk control is not risk adjustment; The zero-risk theory of driver behavior and its implications. Helsingfors: Helsingin Yliopisto. Liikennetutkimusyksikkö.

MLA

Summala Heikki, . Risk control is not risk adjustment; The zero-risk theory of driver behavior and its implications. Helsingfors: Helsingin Yliopisto. Liikennetutkimusyksikkö. 1986.