APA (7th ed.) Citation

Doyle, A. C. (1999). The Adventures of Gerard. Project Gutenberg.

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan. The Adventures of Gerard. Project Gutenberg, 1999.

MLA (9th ed.) Citation

Doyle, Arthur Conan. The Adventures of Gerard. Project Gutenberg, 1999.

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