APA (7th ed.) Citation

Wagner, R., Singer, O., & Waack, C. (1969). Das Rheingold. Breitkopf & Härtel.

Chicago Style (17th ed.) Citation

Wagner, Richard, Otto Singer, and Carl Waack. Das Rheingold. Leipzig: Breitkopf & Härtel, 1969.

MLA (9th ed.) Citation

Wagner, Richard, et al. Das Rheingold. Breitkopf & Härtel, 1969.