APA (7th ed.) Citation

Wagner, R. (1939). "Tristan und Isolde": Isoldes Liebestod. Dt. Grammophon.

Chicago Style (17th ed.) Citation

Wagner, Richard. "Tristan Und Isolde": Isoldes Liebestod. [Berlin]: Dt. Grammophon, 1939.

MLA (9th ed.) Citation

Wagner, Richard. "Tristan Und Isolde": Isoldes Liebestod. Dt. Grammophon, 1939.

Warning: These citations may not always be 100% accurate.