APA (7th ed.) Citation

Horsley, J. W. (2012). Our British Snails. Project Gutenberg.

Chicago Style (17th ed.) Citation

Horsley, John William. Our British Snails. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Horsley, John William. Our British Snails. Project Gutenberg, 2012.

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