Sander, P. S. (1980). Verdi: His life and times. Paganiniana.
Lua i Stíl Chicago (17ú heag.)Sander, Peter Southwell. Verdi: His Life and Times. Neptune City, N.J: Paganiniana, 1980.
Lua MLA (9ú heag.)Sander, Peter Southwell. Verdi: His Life and Times. Paganiniana, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.