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Sources
- Boyd, Lydia and Lynn Pritcher. "Brief history of the U.S. passenger rail industry." Duke University Libraries. Jan. 25, 2008. (June 20, 2008)
- Bryson, Bill. "Made in America." London: Black Swan. 1994.
- Goodman, Peter. "Rethinking the country life as energy costs rise." New York Times. June 25, 2008. (June 23, 2008) http://www.nytimes.com/2008/06/25/business/25exurbs.html?partner=rssnyt
- Rodrigue, Jean-Paul. "Historical geography of transportation." The Geography of Transport Systems. Dept. of Economics and Geography: Hofstra University. 1998-2008. (July 1, 2008) http://people.hofstra.edu/geotrans/eng/ch2en/conc2en/ch2c1_2en_2ed.html
- Simon, Richard. "House approves more funding for thriving public transit." Los Angeles Times. June 27, 2008. (July 2, 2008) http://www.latimes.com/news/nationworld/nation/la-na-transit27-2008jun27,0,5938674.story
- Vlasic, Bill. "Car sales at 10-year low." New York Times. July 2, 2008. (July 2, 2008) http://www.nytimes.com/2008/07/02/business/02auto.html?ref=business
