APA (7th ed.) Citation

Wise, T. J., & Borrow, G. (2008). The Nightingale, the Valkyrie and Raven, and Other Ballads. Project Gutenberg.

Chicago Style (17th ed.) Citation

Wise, Thomas James, and George Borrow. The Nightingale, the Valkyrie and Raven, and Other Ballads. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Wise, Thomas James, and George Borrow. The Nightingale, the Valkyrie and Raven, and Other Ballads. Project Gutenberg, 2008.

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