Citazione Stile APA (7a Edizione)

Hay, W. W. (1982). Railroad engineering (2nd ed.). Wiley.

Citazione stile Chigago Style (17a edizione)

Hay, William Walter. Railroad Engineering. 2nd ed. New York: Wiley, 1982.

Citatione MLA (9a ed.)

Hay, William Walter. Railroad Engineering. 2nd ed. Wiley, 1982.