APA (7th ed.) Citation

Dick, P. K., & Emshwiller, E. (2009). The Defenders. Project Gutenberg.

Chicago Style (17th ed.) Citation

Dick, Philip K., and Ed Emshwiller. The Defenders. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Dick, Philip K., and Ed Emshwiller. The Defenders. Project Gutenberg, 2009.

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