APA (7th ed.) Citation

Courtney, W. L. (2005). Armageddon-And After. Project Gutenberg.

Chicago Style (17th ed.) Citation

Courtney, W. L. Armageddon-And After. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Courtney, W. L. Armageddon-And After. Project Gutenberg, 2005.

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