Cita APA (7th ed.)

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.

Cita Chicago (17th ed.)

National Research Council (U.S.). Transportation Research Board, United States. Federal Highway Administration, American Association of State Highway and Transportation Officials, i Lee Rodegerdts. Roundabouts in the United States. Washington, D.C: Transportation Research Board, 2007.

Cita MLA (9th ed.)

National Research Council (U.S.). Transportation Research Board, et al. Roundabouts in the United States. Transportation Research Board, 2007.