*Brad White, "[http://www.lobbyinginfo.org/documents/RevolveDoor.pdf Congressional Revolving Doors:The Journey from Congress to K Street]", Public Citizen, July 2005.
*Jeffrey H. Birnbaum, "[http://www.washingtonpost.com/wp-dyn/content/article/2005/07/26/AR2005072601562.html Hill a Steppingstone to K Street for Some More Ex-Lawmakers Who Join Private Sector Are Becoming Lobbyists, Study Says]", ''Washington Post'', July 27, 2005; Page A19.
*Neil Gordon, "[http://www.publicintegrity.org/hiredguns/report.aspx?aid=728 State Lobbyists Near the $1 Billion Mark: Laws in flux for 19 states]", Center for Public Integrity, August 10, 2005.