Houghton, J. W. (2014). Tolkien in the new century: Essays in honor of Tom Shippey. McFarland & Company, Inc., Publishers.
Chicago-referens (17:e uppl.)Houghton, John William. Tolkien in the New Century: Essays in Honor of Tom Shippey. Jefferson, North Carolina: McFarland & Company, Inc., Publishers, 2014.
MLA-referens (9:e uppl.)Houghton, John William. Tolkien in the New Century: Essays in Honor of Tom Shippey. McFarland & Company, Inc., Publishers, 2014.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.