APA (7th ed.) Citation

Tolkien, J. R. R., & Tolkien, C. (2009). The legend of Sigurd and Gudrún. Houghton Mifflin Harcourt.

Chicago Style (17th ed.) Citation

Tolkien, J. R. R., and Christopher Tolkien. The Legend of Sigurd and Gudrún. Boston: Houghton Mifflin Harcourt, 2009.

MLA (8th ed.) Citation

Tolkien, J. R. R., and Christopher Tolkien. The Legend of Sigurd and Gudrún. Houghton Mifflin Harcourt, 2009.

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