APA (7th ed.) Citation

Borrow, G., Gosse, E., & Wise, T. J. (2009). Grimhild's Vengeance: Three Ballads. Project Gutenberg.

Chicago Style (17th ed.) Citation

Borrow, George, Edmund Gosse, and Thomas James Wise. Grimhild's Vengeance: Three Ballads. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Borrow, George, et al. Grimhild's Vengeance: Three Ballads. Project Gutenberg, 2009.

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