APA (7th ed.) Citation

Gibbs, G. (2009). The Vagrant Duke. Project Gutenberg.

Chicago Style (17th ed.) Citation

Gibbs, George. The Vagrant Duke. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Gibbs, George. The Vagrant Duke. Project Gutenberg, 2009.

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