Cita APA (7th ed.)

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.