Wren, A. (1971). Computers in transport planning and operation. Allan.
Citazione stile Chigago Style (17a edizione)Wren, Anthony. Computers in Transport Planning and Operation. London: Allan, 1971.
Citatione MLA (9a ed.)Wren, Anthony. Computers in Transport Planning and Operation. Allan, 1971.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.