Savage, C. I. (1959). An economic history of transport. Hutchinson.
Chicago Style (17th ed.) ZitazioaSavage, Christopher I. An Economic History of Transport. London: Hutchinson, 1959.
MLA (9th ed.) ZitazioaSavage, Christopher I. An Economic History of Transport. Hutchinson, 1959.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.