APA (7th ed.) Citation

Gardner, E. G., & Erichsen, N. (2011). The Story of Florence. Project Gutenberg.

Chicago Style (17th ed.) Citation

Gardner, Edmund G., and Nelly Erichsen. The Story of Florence. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Gardner, Edmund G., and Nelly Erichsen. The Story of Florence. Project Gutenberg, 2011.

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