Cita APA (7a ed.)

Hey, K., & Sheldrake, J. (1997). Urban transport. Ashgate.

Cita Chicago Style (17a ed.)

Hey, Kevin, y John Sheldrake. Urban Transport. Aldershot [etc.]: Ashgate, 1997.

Cita MLA (9a ed.)

Hey, Kevin, y John Sheldrake. Urban Transport. Ashgate, 1997.