APA

Ek R., . (1977). Child and the traffic environment. : Voice of the Pedestrian. 7.

Chicago

Ek R, . 1977. Child and the traffic environment. : Voice of the Pedestrian. 7.

Harvard

Ek R., . (1977). Child and the traffic environment. : Voice of the Pedestrian. 7.

MLA

Ek R, . Child and the traffic environment. : Voice of the Pedestrian. 7. 1977.