APA (7e ed.) Bronvermelding

Zimmerman, C. (1981). A life cycle of travel by the American family. U.S. Dept. of Transportation, Federal Highway Administration.

Chicago (17e ed.) Bronvermelding

Zimmerman, Carol. A Life Cycle of Travel by the American Family. Washington, D.C.: U.S. Dept. of Transportation, Federal Highway Administration, 1981.

MLA (9e ed.) Bronvermelding

Zimmerman, Carol. A Life Cycle of Travel by the American Family. U.S. Dept. of Transportation, Federal Highway Administration, 1981.