APA (7th ed.) Citation

Bradley, M. Z. (2010). The colors of space. Project Gutenberg.

Chicago Style (17th ed.) Citation

Bradley, Marion Zimmer. The Colors of Space. To be supplied: Project Gutenberg, 2010.

MLA (8th ed.) Citation

Bradley, Marion Zimmer. The Colors of Space. Project Gutenberg, 2010.

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