APA (7th ed.) Citation

Boothby, G. (2011). The Childerbridge Mystery. Project Gutenberg.

Chicago Style (17th ed.) Citation

Boothby, Guy. The Childerbridge Mystery. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Boothby, Guy. The Childerbridge Mystery. Project Gutenberg, 2011.

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