APA (7th ed.) Citation

Dick, P. K. (2009). The Crystal Crypt. Project Gutenberg.

Chicago Style (17th ed.) Citation

Dick, Philip K. The Crystal Crypt. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Dick, Philip K. The Crystal Crypt. Project Gutenberg, 2009.

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