1. Coalition for Vehicle Choice. 2001. Issue Brief [Online]. Available: http://www.vehiclechoice.org/cafe/brief/cafe.html. Accessed through http://lobby.la.psu.edu/023_CAFE_Standards_1/frameset_cafe.html [Accessed 15 February 2012].
2. CEI. 1998. Competitive Enterprise Institute Donation Form [Online]. Available: http://legacy.library.ucsf.edu/tid/jot72e00;jsessionid=7E2A7861D7A82ABD31915E61BE83AD96.tobacco03 [Accessed 16 November 2011].
3. Moore T.G. 1991. “Central Planning USA-Style: The Case against Corporate Average Fuel Economy (CAFE) Standards.” Stanford University: Hoover Institution.
4. Public Citizen. 2005. Comments on Proposed Rulemaking [Online]. Available: www.citizen.org/documents/2005_FE_Comments.pdf [Accessed 22 November 2011].