APA (7th ed.) Citation

Project Gutenberg & Doyle, A. C. (2000). The Adventure of the Cardboard Box. Project Gutenberg Literary Archive Foundation.

Chicago Style (17th ed.) Citation

Project Gutenberg and Arthur Conan Doyle. The Adventure of the Cardboard Box. Salt Lake City: Project Gutenberg Literary Archive Foundation, 2000.

MLA (9th ed.) Citation

Project Gutenberg and Arthur Conan Doyle. The Adventure of the Cardboard Box. Project Gutenberg Literary Archive Foundation, 2000.

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