APA (7th ed.) Citation

Holmes, T. (2010). London's underworld. Project Gutenberg.

Chicago Style (17th ed.) Citation

Holmes, Thomas. London's Underworld. To be supplied: Project Gutenberg, 2010.

MLA (8th ed.) Citation

Holmes, Thomas. London's Underworld. Project Gutenberg, 2010.

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