APA (7th ed.) Citation

Underhill, A. L. (2012). The Missing Link in Modern Spiritualism. Project Gutenberg.

Chicago Style (17th ed.) Citation

Underhill, A. Leah. The Missing Link in Modern Spiritualism. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Underhill, A. Leah. The Missing Link in Modern Spiritualism. Project Gutenberg, 2012.

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