APA (7th ed.) Citation

Doyle, A. C. (2005). A Study in Scarlet. Project Gutenberg.

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan. A Study in Scarlet. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Doyle, Arthur Conan. A Study in Scarlet. Project Gutenberg, 2005.

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