APA (7th ed.) Citation

White, S. E., & Adams, S. H. (2003). The Mystery. Project Gutenberg.

Chicago Style (17th ed.) Citation

White, Stewart Edward, and Samuel Hopkins Adams. The Mystery. Project Gutenberg, 2003.

MLA (9th ed.) Citation

White, Stewart Edward, and Samuel Hopkins Adams. The Mystery. Project Gutenberg, 2003.

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