Wagner, R., & Webb, S. Tannhäuser: Opera in three acts. The Metropolitan Opera Guild.
Cita Chicago Style (17a ed.)Wagner, Richard, y Susan Webb. Tannhäuser: Opera in Three Acts. New York: The Metropolitan Opera Guild.
Cita MLA (9a ed.)Wagner, Richard, y Susan Webb. Tannhäuser: Opera in Three Acts. The Metropolitan Opera Guild.
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