United States. Department of the Treasury. "Fact Sheet: Administration's Fiscal Year 2012 Budget Provides Incentives for Innovation, Infrastructure, and Education; Middle-Class Tax Relief; a Responsible and Credible Plan for Deficit Reduction; and an Improved Tax System," Press Releases of the United States Department of the Treasury (February 14, 2011). https://fraser.stlouisfed.org/title/6111/item/592081, accessed on March 20, 2025.