APA (7th ed.) Citation

Kornbluth, C. M., & Ashman, W. (2009). The Altar at Midnight. Project Gutenberg.

Chicago Style (17th ed.) Citation

Kornbluth, C. M., and William Ashman. The Altar at Midnight. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Kornbluth, C. M., and William Ashman. The Altar at Midnight. Project Gutenberg, 2009.

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