APA (7th ed.) Citation

Doyle, A. C. (2011). A Duet, with Occasional Chorus. Project Gutenberg.

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan. A Duet, with Occasional Chorus. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Doyle, Arthur Conan. A Duet, with Occasional Chorus. Project Gutenberg, 2011.

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