APA (7th ed.) Citation

Sue, E., & De Leon, D. (2011). The Executioner's Knife Or Joan of Arc. Project Gutenberg.

Chicago Style (17th ed.) Citation

Sue, Eugène, and Daniel De Leon. The Executioner's Knife Or Joan of Arc. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Sue, Eugène, and Daniel De Leon. The Executioner's Knife Or Joan of Arc. Project Gutenberg, 2011.

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