APA (7th ed.) Citation

Cooper, M. D. (2004). The Runaway Asteroid. Project Gutenberg.

Chicago Style (17th ed.) Citation

Cooper, Michael D. The Runaway Asteroid. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Cooper, Michael D. The Runaway Asteroid. Project Gutenberg, 2004.

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