Ross, H. E., & Griffin, L. I. (1979). Guidelines for selecting a small highway sign support system. Dept. of Transportation, Federal Highway Administration.
Chicago Style (17th ed.) CitationRoss, Hayes E., and Lindsay I. Griffin. Guidelines for Selecting a Small Highway Sign Support System. Washington: Dept. of Transportation, Federal Highway Administration, 1979.
MLA (9th ed.) CitationRoss, Hayes E., and Lindsay I. Griffin. Guidelines for Selecting a Small Highway Sign Support System. Dept. of Transportation, Federal Highway Administration, 1979.
Warning: These citations may not always be 100% accurate.