ASHLEY, C. (1994). Traffic And Highway Engineering For Developments Carol Ashley. Balcwell Scientific Publicatio.
Lua i Stíl Chicago (17ú heag.)ASHLEY, Carol. Traffic And Highway Engineering For Developments Carol Ashley. Balcwell Scientific Publicatio, 1994.
Lua MLA (8ú heag.)ASHLEY, Carol. Traffic And Highway Engineering For Developments Carol Ashley. Balcwell Scientific Publicatio, 1994.
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