APA (7th ed.) Citation

Williamson, A. M., & Williamson, C. N. (2006). Set in Silver. Project Gutenberg.

Chicago Style (17th ed.) Citation

Williamson, A. M., and C. N. Williamson. Set in Silver. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Williamson, A. M., and C. N. Williamson. Set in Silver. Project Gutenberg, 2006.

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