Texas. Department of Transportation. Research and Technology Implementation Office, Texas Transportation Institute, & Wiles, P. B. (2005). Advance warning of stopped traffic traffic on freeways: Field studies of congestion warning signs. Texas Transportation Institute, Texas A & M University System ; [Available through the National Technical Information Service].
Chicago Style (17th ed.) CitationTexas. Department of Transportation. Research and Technology Implementation Office, Texas Transportation Institute, and Poonam B. Wiles. Advance Warning of Stopped Traffic Traffic on Freeways: Field Studies of Congestion Warning Signs. College Station, Tex. : [Springfield, Va.]: Texas Transportation Institute, Texas A & M University System ; [Available through the National Technical Information Service], 2005.
MLA (9th ed.) CitationTexas. Department of Transportation. Research and Technology Implementation Office, et al. Advance Warning of Stopped Traffic Traffic on Freeways: Field Studies of Congestion Warning Signs. Texas Transportation Institute, Texas A & M University System ; [Available through the National Technical Information Service], 2005.