APA
Oranen L., . (1977). Use of safety belts. Investigation into effect of compulsory use of safety belts on volume of use. Helsingfors: Central Organization for Traffic Safety in Finland. Report nr 19.
Chicago
Oranen L, . 1977. Use of safety belts. Investigation into effect of compulsory use of safety belts on volume of use. Helsingfors: Central Organization for Traffic Safety in Finland. Report nr 19.
Harvard
Oranen L., . (1977). Use of safety belts. Investigation into effect of compulsory use of safety belts on volume of use. Helsingfors: Central Organization for Traffic Safety in Finland. Report nr 19.
MLA
Oranen L, . Use of safety belts. Investigation into effect of compulsory use of safety belts on volume of use. Helsingfors: Central Organization for Traffic Safety in Finland. Report nr 19. 1977.