APA (7th ed.) Citation

Marden, O. S. (2013). The Victorious Attitude. Project Gutenberg.

Chicago Style (17th ed.) Citation

Marden, Orison Swett. The Victorious Attitude. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Marden, Orison Swett. The Victorious Attitude. Project Gutenberg, 2013.

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