APA (7th ed.) Citation

Daniel, L., & Emshwiller, E. (2009). Martians Never Die. Project Gutenberg.

Chicago Style (17th ed.) Citation

Daniel, Lucius, and Ed Emshwiller. Martians Never Die. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Daniel, Lucius, and Ed Emshwiller. Martians Never Die. Project Gutenberg, 2009.

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