Sweet, A. (1908). La Madonna: Meditazione religiosa : religious meditation. Century Music.
Lua i Stíl Chicago (17ú heag.)Sweet, A.S. La Madonna: Meditazione Religiosa : Religious Meditation. New York: Century Music, 1908.
Lua MLA (9ú heag.)Sweet, A.S. La Madonna: Meditazione Religiosa : Religious Meditation. Century Music, 1908.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.