Rich, M. F. (1976). Who's who in opera: An international biographical directory of singers, conductors, directors, designers, and administrators .. Arno Prss.
Chicago-referens (17:e uppl.)Rich, Maria F. Who's Who in Opera: An International Biographical Directory of Singers, Conductors, Directors, Designers, and Administrators .. New York: Arno Prss, 1976.
MLA-referens (9:e uppl.)Rich, Maria F. Who's Who in Opera: An International Biographical Directory of Singers, Conductors, Directors, Designers, and Administrators .. Arno Prss, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.