APA (7th ed.) Citation

Huxley, T. H. (2000). On the Reception of the 'Origin of Species'. Project Gutenberg.

Chicago Style (17th ed.) Citation

Huxley, Thomas Henry. On the Reception of the 'Origin of Species'. Project Gutenberg, 2000.

MLA (9th ed.) Citation

Huxley, Thomas Henry. On the Reception of the 'Origin of Species'. Project Gutenberg, 2000.

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