Cita APA (7a ed.)
Hay,William W. (1977). An introduction to transportation engineering (2nd ed.). Robert E.Krieger pub..
Cita Chicago Style (17a ed.)
Hay,William W. An Introduction to Transportation Engineering. 2nd ed. New York: Robert E.Krieger pub., 1977.
Cita MLA (9a ed.)
Hay,William W. An Introduction to Transportation Engineering. 2nd ed. Robert E.Krieger pub., 1977.
Precaución: Estas citas no son 100% exactas.