APA
Danish Road Directorate / Vejdirektoratet, PIARC/AIPRC, . (1990). Speed management in urban areas, Copenhagen 14-16 May 1990. Köpenhamn: Danish Road Directorate / Vejdirektoratet.
Chicago
Danish Road Directorate / Vejdirektoratet, PIARC/AIPRC, . 1990. Speed management in urban areas, Copenhagen 14-16 May 1990. Köpenhamn: Danish Road Directorate / Vejdirektoratet.
Harvard
Danish Road Directorate / Vejdirektoratet, PIARC/AIPRC, . (1990). Speed management in urban areas, Copenhagen 14-16 May 1990. Köpenhamn: Danish Road Directorate / Vejdirektoratet.
MLA
Danish Road Directorate / Vejdirektoratet, PIARC/AIPRC, . Speed management in urban areas, Copenhagen 14-16 May 1990. Köpenhamn: Danish Road Directorate / Vejdirektoratet. 1990.