National Research Council (U.S.). Transportation Research Board, United States. Federal Highway Administration, American Association of State Highway and Transportation Officials, & Rodegerdts, L. (2007). Roundabouts in the United States. Transportation Research Board.
芝加哥风格引文National Research Council (U.S.). Transportation Research Board, United States. Federal Highway Administration, American Association of State Highway and Transportation Officials, 与 Lee Rodegerdts. Roundabouts in the United States. Washington, D.C: Transportation Research Board, 2007.
MLA引文National Research Council (U.S.). Transportation Research Board, et al. Roundabouts in the United States. Transportation Research Board, 2007.
警告：这些引文格式不一定是100％准确.