APA (7th ed.) Citation

Wallace, E. (2009). The Clue of the Twisted Candle. Project Gutenberg.

Chicago Style (17th ed.) Citation

Wallace, Edgar. The Clue of the Twisted Candle. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Wallace, Edgar. The Clue of the Twisted Candle. Project Gutenberg, 2009.

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