United States. Department of the Treasury. "Treasury Secretary Lew Announces Front of New $20 to Feature Harriet Tubman, Lays Out Plans for New $20, $10 and $5,"
Press Releases of the United States Department of the Treasury
(April 20, 2016).
https://fraser.stlouisfed.org/title/6111/item/590210, accessed on April 8, 2025.