APA (7th ed.) Citation

Smith, E. E. (2007). The Vortex Blaster. Project Gutenberg.

Chicago Style (17th ed.) Citation

Smith, E. E. The Vortex Blaster. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Smith, E. E. The Vortex Blaster. Project Gutenberg, 2007.

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