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Chicago-viite (17. p.)National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, National Research Council (U.S.). Committee on Geometric Highway Design, ja Median Barriers and Sign National Research Council (U.S.). Committee on Guardrail. Geometric Design: Protective Barrier Systems; Luminaire Supports : 6 Reports. Washington: Highway Research Board, National Research Council, 1970.
MLA-viite (9. p.)National Research Council (U.S.). Highway Research Board, et al. Geometric Design: Protective Barrier Systems; Luminaire Supports : 6 Reports. Highway Research Board, National Research Council, 1970.