National Cooperative Highway Research Program, National Research Council (U.S.). Transportation Research Board, & Potts, I. B. (2004). Safety of U-turns at unsignalized median openings. Transportation Research Board.
Citação do estilo Chicago (17ª ed.)National Cooperative Highway Research Program, National Research Council (U.S.). Transportation Research Board, e Ingrid B. Potts. Safety of U-turns at Unsignalized Median Openings. Washington, D.C: Transportation Research Board, 2004.
Citação MLA (9ª ed.)National Cooperative Highway Research Program, et al. Safety of U-turns at Unsignalized Median Openings. Transportation Research Board, 2004.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.