Informazzjoni minn organizzazzjoni tal-arti (Verifikat minn Operabase)
Norma by Bellini, Ġim 30 Nov 2007, Minn (2007/2007), Immexxi minn John Copley, Laurie Feldman,, Surmast Direttur Maurizio Benini, Metropolitan Opera House, New York City, United States