APA (7th ed.) Citation

Romanes, G. J., & Gore, C. (2005). Thoughts on Religion. Project Gutenberg.

Chicago Style (17th ed.) Citation

Romanes, George John, and Charles Gore. Thoughts on Religion. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Romanes, George John, and Charles Gore. Thoughts on Religion. Project Gutenberg, 2005.

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