Tolkien, J. R. R. (1987). The Hobbit: Or There and Back again (50th anniversary ed.). Houghton.
Chicago Style aipamenaTolkien, J. R. R. The Hobbit: Or There and Back Again. 50th anniversary ed. Boston: Houghton, 1987.
MLA aipamenaTolkien, J. R. R. The Hobbit: Or There and Back Again. 50th anniversary ed. Houghton, 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.