Hill, R. (1949). The Symphony. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Hill, Ralph. The Symphony. Harmondsworth, Middlesex: Penguin Books, 1949.
Lua MLA (8ú heag.)Hill, Ralph. The Symphony. Penguin Books, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.