APA aipamena

Tolkien,J.R.R, & Tolkien,Christopher. (2009). The legend of Sigurd and Gudrun. Harper collins.

Chicago Style aipamena

Tolkien,J.R.R, and Tolkien,Christopher. The Legend of Sigurd and Gudrun. London: Harper collins, 2009.

MLA aipamena

Tolkien,J.R.R, and Tolkien,Christopher. The Legend of Sigurd and Gudrun. Harper collins, 2009.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.