Burns, M. (2005). Perilous realms: Celtic and Norse in Tolkien's Middle-earth. University of Toronto Press.
Chicago-referens (17:e uppl.)Burns, Marjorie. Perilous Realms: Celtic and Norse in Tolkien's Middle-earth. Toronto ; Buffalo: University of Toronto Press, 2005.
MLA-referens (8:e uppl.)Burns, Marjorie. Perilous Realms: Celtic and Norse in Tolkien's Middle-earth. University of Toronto Press, 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.