Breen, Walter H. Walter Breen’s Complete Encyclopedia of U.S. and Colonial Coins. Doubleday, 1988.

Friedberg, Robert S. Paper Money of the United States. 19ª edição, 2014.

Green, Paul M. Collecting U.S. Paper Money. Whitman Publishing, 2005.

Taxay, Don. The U.S. Mint and Coinage: An Illustrated History. Arco Publishing, 1970.

The Professional Coin Grading Service (PCGS). Currency Grading Guide. Acesso em 2025.

Numismatic Guaranty Corporation (NGC). U.S. Paper Money Guide. Acesso em 2025.

Sociedade Numismática Brasileira. Revista Brasileira de Numismática, edições variadas.

Bureau of Engraving and Printing (BEP). History of U.S. Currency. Disponível em: https://www.moneyfactory.gov/history.html

Official Red Book: A Guide Book of United States Paper Money, 2025 Edition.