APA (7th ed.) Citation

Serviss, G. P. (2006). Edison's Conquest of Mars. Project Gutenberg.

Chicago Style (17th ed.) Citation

Serviss, Garrett Putman. Edison's Conquest of Mars. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Serviss, Garrett Putman. Edison's Conquest of Mars. Project Gutenberg, 2006.

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