APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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