National Research Council (U.S.). Highway Research Board. (1952). Highway sufficiency ratings: Presented at the 31st annual meeting, January 1952. The Board.
Citazione stile Chigago Style (17a edizione)National Research Council (U.S.). Highway Research Board. Highway Sufficiency Ratings: Presented at the 31st Annual Meeting, January 1952. Washington, D.C: The Board, 1952.
Citatione MLA (9a ed.)National Research Council (U.S.). Highway Research Board. Highway Sufficiency Ratings: Presented at the 31st Annual Meeting, January 1952. The Board, 1952.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.