APA (7th ed.) Citation

Tiffany, J. K. (2011). History of the Postage Stamps of the United States of America. Project Gutenberg.

Chicago Style (17th ed.) Citation

Tiffany, John K. History of the Postage Stamps of the United States of America. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Tiffany, John K. History of the Postage Stamps of the United States of America. Project Gutenberg, 2011.

Warning: These citations may not always be 100% accurate.