National Research Council (U.S.). Transportation Research Board. (1993). Nonmotorized transportation research and issues: Operations and safety; planning and administration. National Academy Press.
Citazione stile Chigago Style (17a edizione)National Research Council (U.S.). Transportation Research Board. Nonmotorized Transportation Research and Issues: Operations and Safety; Planning and Administration. Washington, D.C: National Academy Press, 1993.
Citatione MLA (9a ed.)National Research Council (U.S.). Transportation Research Board. Nonmotorized Transportation Research and Issues: Operations and Safety; Planning and Administration. National Academy Press, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.