APA (7th ed.) Citation

Heller, S., & Heller, S. (1994). The Heller collection: 34 romantic etudes for the piano. Universal-Edition.

Chicago Style (17th ed.) Citation

Heller, Stephen, and Stephen Heller. The Heller Collection: 34 Romantic Etudes for the Piano. Valley Forge (Pa.), Wien <<[u.a.]>>: Universal-Edition, 1994.

MLA (9th ed.) Citation

Heller, Stephen, and Stephen Heller. The Heller Collection: 34 Romantic Etudes for the Piano. Universal-Edition, 1994.