Citazione Stile APA (7a Edizione)

National Research Council (U.S.). Highway Research Board. (1951). Engineering soil survey mapping: Presented at the Thirtieth Annual Meeting, 1951. Highway Research Board.

Citazione stile Chigago Style (17a edizione)

National Research Council (U.S.). Highway Research Board. Engineering Soil Survey Mapping: Presented at the Thirtieth Annual Meeting, 1951. Washington, D.C: Highway Research Board, 1951.

Citatione MLA (9a ed.)

National Research Council (U.S.). Highway Research Board. Engineering Soil Survey Mapping: Presented at the Thirtieth Annual Meeting, 1951. Highway Research Board, 1951.