APA (7th ed.) Citation

Ballantyne, R. M. (2007). The Gorilla Hunters. Project Gutenberg.

Chicago Style (17th ed.) Citation

Ballantyne, R. M. The Gorilla Hunters. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Ballantyne, R. M. The Gorilla Hunters. Project Gutenberg, 2007.

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