APA (7th ed.) Citation

Starzl, R. F., & Smith, E. C. (2012). The Metal Moon. Project Gutenberg.

Chicago Style (17th ed.) Citation

Starzl, Roman Frederick, and Everett C. Smith. The Metal Moon. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Starzl, Roman Frederick, and Everett C. Smith. The Metal Moon. Project Gutenberg, 2012.

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