APA (7th ed.) Citation

MacLaren, G. (2013). The Riddle and the Ring or, Won by Nerve. Project Gutenberg.

Chicago Style (17th ed.) Citation

MacLaren, Gordon. The Riddle and the Ring or, Won by Nerve. Project Gutenberg, 2013.

MLA (9th ed.) Citation

MacLaren, Gordon. The Riddle and the Ring or, Won by Nerve. Project Gutenberg, 2013.

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