APA (7th ed.) Citation

Cullum, R. (2011). The Men Who Wrought. Project Gutenberg.

Chicago Style (17th ed.) Citation

Cullum, Ridgwell. The Men Who Wrought. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Cullum, Ridgwell. The Men Who Wrought. Project Gutenberg, 2011.

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