APA (7th ed.) Citation

Marvin, F. S. (2005). The Unity of Western Civilization. Project Gutenberg.

Chicago Style (17th ed.) Citation

Marvin, Francis Sydney. The Unity of Western Civilization. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Marvin, Francis Sydney. The Unity of Western Civilization. Project Gutenberg, 2005.

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