APA (7th ed.) Citation

Le Queux, W. (2008). The Seven Secrets. Project Gutenberg.

Chicago Style (17th ed.) Citation

Le Queux, William. The Seven Secrets. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Le Queux, William. The Seven Secrets. Project Gutenberg, 2008.

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