Cita APA (7a ed.)

Hay, W. W. (1989). An introduction to transportation engineering (2a ed.). Robert E Krieger.

Cita Chicago Style (17a ed.)

Hay, William W. An Introduction to Transportation Engineering. 2a ed. Malabar, Florida: Robert E Krieger, 1989.

Cita MLA (8a ed.)

Hay, William W. An Introduction to Transportation Engineering. 2a ed. Robert E Krieger, 1989.