Não informado. (1938). Traffic Engineering. Institute of Traffic Engineering.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Traffic Engineering. New York: Institute of Traffic Engineering, 1938.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Traffic Engineering. Institute of Traffic Engineering, 1938.
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