APA
World Health Organization. Regional Office for Europe, . (1968). Human factors in road accidents. Köpenhamn: World Health Organization. Regional Office for Europe.
Chicago
World Health Organization. Regional Office for Europe, . 1968. Human factors in road accidents. Köpenhamn: World Health Organization. Regional Office for Europe.
Harvard
World Health Organization. Regional Office for Europe, . (1968). Human factors in road accidents. Köpenhamn: World Health Organization. Regional Office for Europe.
MLA
World Health Organization. Regional Office for Europe, . Human factors in road accidents. Köpenhamn: World Health Organization. Regional Office for Europe. 1968.