- Cervero, R. (1997). Paratransit in America. Santa Barbara, CA: Praeger Publishers.
- United States Petroleum Administration for War. (1946). A history of the Petroleum Administration for War, 1941-1945. Washington, DC: Government Printing Office.
- Ferguson, E. (1997). The rise and fall of the American carpool: 1970 ‐ 1990, Transportation. 24(4), pp. 349‐376.
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