APA (7th ed.) Citation

Howe, E. W. (2011). The Mystery of the Locks. Project Gutenberg.

Chicago Style (17th ed.) Citation

Howe, Edgar Watson. The Mystery of the Locks. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Howe, Edgar Watson. The Mystery of the Locks. Project Gutenberg, 2011.

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