APA (7th ed.) Citation

London, J., & Grant, G. (2007). The Scarlet Plague. Project Gutenberg.

Chicago Style (17th ed.) Citation

London, Jack, and Gordon Grant. The Scarlet Plague. Project Gutenberg, 2007.

MLA (9th ed.) Citation

London, Jack, and Gordon Grant. The Scarlet Plague. Project Gutenberg, 2007.

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