APA (7th ed.) Citation

Tolkien, J., & Tolkien, C. (2010). The legend of Sigurd & Gudrun. HarperCollinsPublishers.

Chicago Style (17th ed.) Citation

Tolkien, J.R.R, and Christopher Tolkien. The Legend of Sigurd & Gudrun. London: HarperCollinsPublishers, 2010.

MLA (9th ed.) Citation

Tolkien, J.R.R, and Christopher Tolkien. The Legend of Sigurd & Gudrun. HarperCollinsPublishers, 2010.

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