APA (7th ed.) Citation

Quick, H., & Lowell, O. (2006). Double Trouble; Or, Every Hero His Own Villain. Project Gutenberg.

Chicago Style (17th ed.) Citation

Quick, Herbert, and Orson Lowell. Double Trouble; Or, Every Hero His Own Villain. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Quick, Herbert, and Orson Lowell. Double Trouble; Or, Every Hero His Own Villain. Project Gutenberg, 2006.

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