APA (7th ed.) Citation

Oppenheim, J. (2004). The Nine-Tenths. Project Gutenberg.

Chicago Style (17th ed.) Citation

Oppenheim, James. The Nine-Tenths. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Oppenheim, James. The Nine-Tenths. Project Gutenberg, 2004.

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