APA (7th ed.) Citation

Dean, G. M. (2013). Agent Nine Solves His First Case A Story of the Daring Exploits of the G Men. Project Gutenberg.

Chicago Style (17th ed.) Citation

Dean, Graham M. Agent Nine Solves His First Case A Story of the Daring Exploits of the G Men. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Dean, Graham M. Agent Nine Solves His First Case A Story of the Daring Exploits of the G Men. Project Gutenberg, 2013.

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