Cita APA (7a ed.)

Hay, W. W. (1977). An introduction to transportation engineering (2nd ed.). Krieger.

Cita Chicago Style (17a ed.)

Hay, William W. An Introduction to Transportation Engineering. 2nd ed. Florida: Krieger, 1977.

Cita MLA (8a ed.)

Hay, William W. An Introduction to Transportation Engineering. 2nd ed. Krieger, 1977.