APA (7th ed.) Citation

Abernathy, R. (2010). World of the Drone. Project Gutenberg.

Chicago Style (17th ed.) Citation

Abernathy, Robert. World of the Drone. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Abernathy, Robert. World of the Drone. Project Gutenberg, 2010.

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