APA (7th ed.) Citation

Croly, H. D. (2004). The Promise of American Life. Project Gutenberg.

Chicago Style (17th ed.) Citation

Croly, Herbert David. The Promise of American Life. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Croly, Herbert David. The Promise of American Life. Project Gutenberg, 2004.

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