Smeed, R. J. (1961). The traffic problem in towns. Manchester Statistical Society.
Cita Chicago (17th ed.)Smeed, Reuben J. The Traffic Problem in Towns. Manchester: Manchester Statistical Society, 1961.
Cita MLA (8th ed.)Smeed, Reuben J. The Traffic Problem in Towns. Manchester Statistical Society, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.