APA

Hörberg U., Erikson B., . (1980). Pedestrian behavior at crossings with and without traffic lights. Uppsala: Uppsala psychological reports no 282.

Chicago

Hörberg U, Erikson B, . 1980. Pedestrian behavior at crossings with and without traffic lights. Uppsala: Uppsala psychological reports no 282.

Harvard

Hörberg U., Erikson B., . (1980). Pedestrian behavior at crossings with and without traffic lights. Uppsala: Uppsala psychological reports no 282.

MLA

Hörberg U, Erikson B, . Pedestrian behavior at crossings with and without traffic lights. Uppsala: Uppsala psychological reports no 282. 1980.