APA (7th ed.) Zitazioa

Hay, W. W. (1961). An Introduction to tansportation engineering. John Wiley.

Chicago Style (17th ed.) Zitazioa

Hay, William W. An Introduction to Tansportation Engineering. NewYork: John Wiley, 1961.

MLA (9th ed.) Zitazioa

Hay, William W. An Introduction to Tansportation Engineering. John Wiley, 1961.