APA (7th ed.) Citation

Schumann, R., & Schumann, C. (1979). Variations on the name "Abegg": For the piano. G. Schirmer.

Chicago Style (17th ed.) Citation

Schumann, Robert, and Clara Schumann. Variations on the Name "Abegg": For the Piano. New York: G. Schirmer, 1979.

MLA (9th ed.) Citation

Schumann, Robert, and Clara Schumann. Variations on the Name "Abegg": For the Piano. G. Schirmer, 1979.