Texas. Dept. of Transportation. [U.S. Highway 81 in Williamson County], Photograph, May 25, 1939; (http://texashistory.unt.edu/ark:/67531/metapth167361/ : accessed February 27, 2015), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting Texas Department of Transportation, Austin, Texas.
Note: Inconsistencies in capitalization and punctuation within the Portal may affect this citation. Before using this citation in formal writing, please consult your preferred style manual. More information.