Cita APA (7th ed.)

Wagner, R., & Karajan, H. v. (1969). Siegfried: Richard Wagner. Polydor.

Cita Chicago (17th ed.)

Wagner, Richard, i Herbert von Karajan. Siegfried: Richard Wagner. [Hamburg]: Polydor, 1969.

Cita MLA (8th ed.)

Wagner, Richard, i Herbert von Karajan. Siegfried: Richard Wagner. Polydor, 1969.