Cita APA

Hay, W. W. 1., & Hay, W. W. 1. (1961). An introduction to transportation engineering. New York, New York.

Citación estilo Chicago

Hay, William Walter 1908-, y William Walter 1908- Hay. An Introduction to Transportation Engineering. New York, New York, 1961.

Cita MLA

Hay, William Walter 1908-, y William Walter 1908- Hay. An Introduction to Transportation Engineering. New York, New York, 1961.