Citazione Stile APA (7a Edizione)

HAY, W. W. (1977). An introduction to transportation engineering (2.). John Wiley & Sons.

Citazione stile Chigago Style (17a edizione)

HAY, WILLIAN WALTER. An Introduction to Transportation Engineering. 2. New York: John Wiley & Sons, 1977.

Citatione MLA (8a ed.)

HAY, WILLIAN WALTER. An Introduction to Transportation Engineering. 2. John Wiley & Sons, 1977.