APA (7th ed.) Citation

Voltaire. (2006). Zadig Or, The Book of Fate. Project Gutenberg.

Chicago Style (17th ed.) Citation

Voltaire. Zadig Or, The Book of Fate. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Voltaire. Zadig Or, The Book of Fate. Project Gutenberg, 2006.

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