APA (7th ed.) Citation

Willis, H., Hardman, F., & Doubleday, T. (2009). Tales from "Blackwood," Volume 7. Project Gutenberg.

Chicago Style (17th ed.) Citation

Willis, Herbert, Frederick Hardman, and Thomas Doubleday. Tales from "Blackwood," Volume 7. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Willis, Herbert, et al. Tales from "Blackwood," Volume 7. Project Gutenberg, 2009.

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