APA (7th ed.) Citation

Brennan, W. A. (2011). Tobacco Leaves Being a Book of Facts for Smokers. Project Gutenberg.

Chicago Style (17th ed.) Citation

Brennan, W. A. Tobacco Leaves Being a Book of Facts for Smokers. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Brennan, W. A. Tobacco Leaves Being a Book of Facts for Smokers. Project Gutenberg, 2011.

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