Walküre
MLA
Wagner, Richard, et al. Walküre. The Golden Age of Opera. [S.l.: Celebrity Record Co.] , [1960?]
APA, 7th edition
Wagner, R., Flagstad, K., Konetzni, H., Treptow, G., Frantz, F., & Furtwängler, W. ([1960?]). Walküre. The Golden age of opera. [S.l.: Celebrity Record Co.]
Chicago, 17th edition
Wagner, Richard, Kirsten Flagstad, Hilde Konetzni, Günther Treptow, Ferdinand Frantz, and Wilhelm Furtwängler. Walküre. The Golden age of opera. [S.l.: Celebrity Record Co.] , [1960?]