APA (7th ed.) Citation

Marden, O. S., & Bayley, A. (2004). An Iron Will. Project Gutenberg.

Chicago Style (17th ed.) Citation

Marden, Orison Swett, and Abner Bayley. An Iron Will. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Marden, Orison Swett, and Abner Bayley. An Iron Will. Project Gutenberg, 2004.

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