Cita APA (7th ed.)

Wren, A. (1971). Computers in transport planning and operation. Ian Allan.

Cita Chicago (17th ed.)

Wren, Anthony. Computers in Transport Planning and Operation. Londres: Ian Allan, 1971.

Cita MLA (9th ed.)

Wren, Anthony. Computers in Transport Planning and Operation. Ian Allan, 1971.