Seltsam, W. H. (1957). Metropolitan opera annals: First supplement 1947-1957. H.W. Wilson.
Cita Chicago (17th ed.)Seltsam, William H. Metropolitan Opera Annals: First Supplement 1947-1957. New York: H.W. Wilson, 1957.
Cita MLA (9th ed.)Seltsam, William H. Metropolitan Opera Annals: First Supplement 1947-1957. H.W. Wilson, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.