Lacey, P. J., & Editor by Baker , V. A. .. (1974). World transport and communications. Macdonald Educational.
Cita Chicago (17th ed.)Lacey, Peter J., i Valerie A. Editor by Baker. World Transport and Communications. London: Macdonald Educational, 1974.
Cita MLA (9th ed.)Lacey, Peter J., i Valerie A. Editor by Baker. World Transport and Communications. Macdonald Educational, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.