Gravil, R. (2007). Elizabeth Gaskell: Mary Barton. Humanities-Ebooks.
Chicago Style (17th ed.) ZitazioaGravil, Richard. Elizabeth Gaskell: Mary Barton. Tirril [England]: Humanities-Ebooks, 2007.
MLA (9th ed.) ZitazioaGravil, Richard. Elizabeth Gaskell: Mary Barton. Humanities-Ebooks, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.