Roosmark, P., & Nilsson, G. (1972). Different general speed limits in Sweden: Effects on road accidents and on vehicle speeds. Statens väg- och trafikinstitut.
Citace podle Chicago (17th ed.)Roosmark, Per-Olov, a Göran Nilsson. Different General Speed Limits in Sweden: Effects on Road Accidents and on Vehicle Speeds. Stockholm: Statens väg- och trafikinstitut, 1972.
Citace podle MLA (8th ed.)Roosmark, Per-Olov, a Göran Nilsson. Different General Speed Limits in Sweden: Effects on Road Accidents and on Vehicle Speeds. Statens väg- och trafikinstitut, 1972.
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