APA (7th ed.) Citation

Jones, R. F. (2009). The Great Gray Plague. Project Gutenberg.

Chicago Style (17th ed.) Citation

Jones, Raymond F. The Great Gray Plague. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Jones, Raymond F. The Great Gray Plague. Project Gutenberg, 2009.

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