United States. Department of the Treasury. "Testimony of Secretary of the Treasury Janet L. Yellen, Before the Subcommittee on Financial Services and General Government Committee on Appropriations, United States Senate,"
Press Releases of the United States Department of the Treasury
(June 23, 2021).
https://fraser.stlouisfed.org/title/6111/item/604259, accessed on March 15, 2026.