Hillegas, M. R. (1969). Shadows of imagination: The fantasies of C. S. Lewis, J. R. R. Tolkien, and Charles Williams. Southern Illinois University Press.
Lua i Stíl Chicago (17ú heag.)Hillegas, Mark Robert. Shadows of Imagination: The Fantasies of C. S. Lewis, J. R. R. Tolkien, and Charles Williams. Carbondale: Southern Illinois University Press, 1969.
Lua MLA (8ú heag.)Hillegas, Mark Robert. Shadows of Imagination: The Fantasies of C. S. Lewis, J. R. R. Tolkien, and Charles Williams. Southern Illinois University Press, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.