APA (7th ed.) Zitazioa
Goel, . A. K. (2014). Highway Engineering (2nd ed.). S K Kataria & Sons.
Chicago Style (17th ed.) Zitazioa
Goel, Alok Kumar. Highway Engineering. 2nd ed. New Delhi: S K Kataria & Sons, 2014.
MLA (9th ed.) Zitazioa
Goel, Alok Kumar. Highway Engineering. 2nd ed. S K Kataria & Sons, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.