APA (7th ed.) Citation

Smiles, S. (1990). Men of invention and industry. Project Gutenberg.

Chicago Style (17th ed.) Citation

Smiles, Samuel. Men of Invention and Industry. Champaign, Ill: Project Gutenberg, 1990.

MLA (9th ed.) Citation

Smiles, Samuel. Men of Invention and Industry. Project Gutenberg, 1990.

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