APA (7th ed.) Citation

Ballantyne, R. M. (2007). Deep Down, a Tale of the Cornish Mines. Project Gutenberg.

Chicago Style (17th ed.) Citation

Ballantyne, R. M. Deep Down, a Tale of the Cornish Mines. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Ballantyne, R. M. Deep Down, a Tale of the Cornish Mines. Project Gutenberg, 2007.

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