Swann, D., & Tolkien, J. R. R. (1992). Bilbo's last song. Albert House Press.
Chicago Style aipamenaSwann, Donald, and J. R. R. Tolkien. Bilbo's Last Song. London: Albert House Press, 1992.
MLA aipamenaSwann, Donald, and J. R. R. Tolkien. Bilbo's Last Song. Albert House Press, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.