APA (7th ed.) Citation

Beethoven, L. v., Von Bulow, H., & Lebert, S. Adagio from Sonata op.81. G. Schirmer.

Chicago Style (17th ed.) Citation

Beethoven, Ludwig van, Hans Von Bulow, and Sigmund Lebert. Adagio from Sonata Op.81. New York: G. Schirmer.

MLA (9th ed.) Citation

Beethoven, Ludwig van, et al. Adagio from Sonata Op.81. G. Schirmer.