APA (7th ed.) Citation

Hume, F. (2008). The Opal Serpent. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hume, Fergus. The Opal Serpent. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Hume, Fergus. The Opal Serpent. Project Gutenberg, 2008.

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