APA (7th ed.) Citation

Dean, G. M. (2014). Agent Nine and the Jewel Mystery A Story of Thrilling Exploits of the G-Men. Project Gutenberg.

Chicago Style (17th ed.) Citation

Dean, Graham M. Agent Nine and the Jewel Mystery A Story of Thrilling Exploits of the G-Men. Project Gutenberg, 2014.

MLA (9th ed.) Citation

Dean, Graham M. Agent Nine and the Jewel Mystery A Story of Thrilling Exploits of the G-Men. Project Gutenberg, 2014.

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