APA

Town Planning Office - Gothenburg, Traffic Planning Department, . (1971). Traffic zone system in Gothenburg. Göteborg: Town Planning Office - Gothenburg.

Chicago

Town Planning Office - Gothenburg, Traffic Planning Department, . 1971. Traffic zone system in Gothenburg. Göteborg: Town Planning Office - Gothenburg.

Harvard

Town Planning Office - Gothenburg, Traffic Planning Department, . (1971). Traffic zone system in Gothenburg. Göteborg: Town Planning Office - Gothenburg.

MLA

Town Planning Office - Gothenburg, Traffic Planning Department, . Traffic zone system in Gothenburg. Göteborg: Town Planning Office - Gothenburg. 1971.