National Research Council (U.S.). Highway Research Board. (1957). Manpower potentials in highway engineering: Presented at the Thirty-sixth Annual Meeting, January 7-11, 1957. Highway Research Board.
Citazione stile Chigago Style (17a edizione)National Research Council (U.S.). Highway Research Board. Manpower Potentials in Highway Engineering: Presented at the Thirty-sixth Annual Meeting, January 7-11, 1957. Washington: Highway Research Board, 1957.
Citatione MLA (9a ed.)National Research Council (U.S.). Highway Research Board. Manpower Potentials in Highway Engineering: Presented at the Thirty-sixth Annual Meeting, January 7-11, 1957. Highway Research Board, 1957.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.