APA (7th ed.) Citation

Marden, O. S. (2007). Pushing to the Front. Project Gutenberg.

Chicago Style (17th ed.) Citation

Marden, Orison Swett. Pushing to the Front. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Marden, Orison Swett. Pushing to the Front. Project Gutenberg, 2007.

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