APA (7th ed.) Citation

Dick, P. K., & Vestal, H. B. (2009). The Gun. Project Gutenberg.

Chicago Style (17th ed.) Citation

Dick, Philip K., and Herman B. Vestal. The Gun. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Dick, Philip K., and Herman B. Vestal. The Gun. Project Gutenberg, 2009.

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