APA (7th ed.) Citation

Le Queux, W. (2012). The Sign of the Stranger. Project Gutenberg.

Chicago Style (17th ed.) Citation

Le Queux, William. The Sign of the Stranger. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Le Queux, William. The Sign of the Stranger. Project Gutenberg, 2012.

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