Sharp, C. (1965). The Problem of transport. Pergamon press.
Cita Chicago (17th ed.)Sharp, Clifford. The Problem of Transport. Oxford: Pergamon press, 1965.
Cita MLA (9th ed.)Sharp, Clifford. The Problem of Transport. Pergamon press, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.