APA (7th ed.) Citation

Freeman, R. A. (2004). The Red Thumb Mark. Project Gutenberg.

Chicago Style (17th ed.) Citation

Freeman, R. Austin. The Red Thumb Mark. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Freeman, R. Austin. The Red Thumb Mark. Project Gutenberg, 2004.

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