APA

Nilsson G., . (1977). Trials with differentiated speed limits during the years 1968-1972 (abbreviated version of Rapport No. 88, 1976). Linköping: Statens Väg- och Trafikinstitut. Rapport nr 117A.

Chicago

Nilsson G, . 1977. Trials with differentiated speed limits during the years 1968-1972 (abbreviated version of Rapport No. 88, 1976). Linköping: Statens Väg- och Trafikinstitut. Rapport nr 117A.

Harvard

Nilsson G., . (1977). Trials with differentiated speed limits during the years 1968-1972 (abbreviated version of Rapport No. 88, 1976). Linköping: Statens Väg- och Trafikinstitut. Rapport nr 117A.

MLA

Nilsson G, . Trials with differentiated speed limits during the years 1968-1972 (abbreviated version of Rapport No. 88, 1976). Linköping: Statens Väg- och Trafikinstitut. Rapport nr 117A. 1977.