Não informado. (1938). Traffic Engineering. Institute of Traffic Engineering.
Chicago-viite (17. p.)Não informado. Traffic Engineering. New York: Institute of Traffic Engineering, 1938.
MLA-viite (8. p.)Não informado. Traffic Engineering. Institute of Traffic Engineering, 1938.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.