Cita APA (7a ed.)

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.