APA (7th ed.) Citation

Bradley, M. Z. (2007). The Colors of Space. Project Gutenberg.

Chicago Style (17th ed.) Citation

Bradley, Marion Zimmer. The Colors of Space. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Bradley, Marion Zimmer. The Colors of Space. Project Gutenberg, 2007.

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