Westrup, J. A. (1954). History of music in sound, vol. 5: Opera and church music. RCA Victor LM6030.
Chicago-referens (17:e uppl.)Westrup, Jack Allan. History of Music in Sound, Vol. 5: Opera and Church Music. s.l: RCA Victor LM6030, 1954.
MLA-referens (9:e uppl.)Westrup, Jack Allan. History of Music in Sound, Vol. 5: Opera and Church Music. RCA Victor LM6030, 1954.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.