APA (7th ed.) Citation

Beethoven, L. v., Schubert, F., Schumann, R., Wunderlich, F., & Giesen, H. (1996). Adelaide. Orfeo.

Chicago Style (17th ed.) Citation

Beethoven, Ludwig van, Franz Schubert, Robert Schumann, Fritz Wunderlich, and Hubert Giesen. Adelaide. München: Orfeo, 1996.

MLA (9th ed.) Citation

Beethoven, Ludwig van, et al. Adelaide. Orfeo, 1996.