APA (7th ed.) Citation

Drummond, H., & Wain, L. (2009). The Monkey That Would Not Kill. Project Gutenberg.

Chicago Style (17th ed.) Citation

Drummond, Henry, and Louis Wain. The Monkey That Would Not Kill. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Drummond, Henry, and Louis Wain. The Monkey That Would Not Kill. Project Gutenberg, 2009.

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