APA (7th ed.) Citation

Hornblow, A., Klein, C., & Cahan, S. (2010). John Marsh's Millions. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hornblow, Arthur, Charles Klein, and Samuel Cahan. John Marsh's Millions. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Hornblow, Arthur, et al. John Marsh's Millions. Project Gutenberg, 2010.

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