Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Hey, Keving, i John Sheldrake. Urban Transport. Aldershot: Ashgate, 1997.

Cita MLA (9th ed.)

Hey, Keving, i John Sheldrake. Urban Transport. Ashgate, 1997.