Cita APA (7a ed.)

Hay, W. W. (1977). An introduction to transportation engineering. Krieger.

Cita Chicago Style (17a ed.)

Hay, Wiliam W. An Introduction to Transportation Engineering. Florida: Krieger, 1977.

Cita MLA (9a ed.)

Hay, Wiliam W. An Introduction to Transportation Engineering. Krieger, 1977.