APA (7th ed.) Citation

Sumner, C. (2004). The Duel Between France and Germany. Project Gutenberg.

Chicago Style (17th ed.) Citation

Sumner, Charles. The Duel Between France and Germany. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Sumner, Charles. The Duel Between France and Germany. Project Gutenberg, 2004.

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