Hewes, L. I. (1942). American highway practice. Wiley.
Cita Chicago (17th ed.)Hewes, Laurence I. American Highway Practice. New York: Wiley, 1942.
Cita MLA (8th ed.)Hewes, Laurence I. American Highway Practice. Wiley, 1942.
Atenció: Aquestes cites poden no estar 100% correctes.