Watson, P. L. (1974). The value of time: Behavioral models of modal choice. Lexington, Mass: Lexington Books.
Παραπομπή Chicago StyleWatson, Peter Leslie. The Value of Time: Behavioral Models of Modal Choice. Lexington, Mass: Lexington Books, 1974.
Παραπομπή MLAWatson, Peter Leslie. The Value of Time: Behavioral Models of Modal Choice. Lexington, Mass: Lexington Books, 1974.
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