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.
Chicago-Zitierstil (17. Ausg.)National Research Council (U.S.). Transportation Research Board, United States. Federal Highway Administration, American Association of State Highway and Transportation Officials, und Lee Rodegerdts. Roundabouts in the United States. Washington, D.C: Transportation Research Board, 2007.
MLA-Zitierstil (9. Ausg.)National Research Council (U.S.). Transportation Research Board, et al. Roundabouts in the United States. Transportation Research Board, 2007.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.