APA (7th ed.) Zitazioa
Hay, W. W. (1961). An introduction to transportation engineering. Wiley.
Chicago Style (17th ed.) Zitazioa
Hay, William Walter. An Introduction to Transportation Engineering. New York: Wiley, 1961.
MLA (9th ed.) Zitazioa
Hay, William Walter. An Introduction to Transportation Engineering. Wiley, 1961.
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