APA (7th ed.) Citation

Doyle, A. C. (2003). The Green Flag, and Other Stories of War and Sport. Project Gutenberg.

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan. The Green Flag, and Other Stories of War and Sport. Project Gutenberg, 2003.

MLA (9th ed.) Citation

Doyle, Arthur Conan. The Green Flag, and Other Stories of War and Sport. Project Gutenberg, 2003.

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