National Highways Association. National Highways preliminary map of the state of Texas: showing sixty-two hundred miles of national highways proposed by the National Highways Association, Washington, D.C.. Washington, D.C.. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc387/. Accessed July 28, 2016.
Note: Inconsistencies in capitalization and punctuation within the Digital Library may affect this citation. Before using this citation in formal writing, please consult your preferred style manual. More information.