United States. Office of Management and Budget. "Budget Authority -- On- and Off-Budget," in United States. Office of Management and Budget. "Fiscal Year 2008," Historical Tables, Budget of the United States Government (February 5, 2007) : 65-97. https://fraser.stlouisfed.org/title/383/item/6434/toc/118961 , accessed on March 28, 2024.