APA (7th ed.) Citation

Mozart, W. A., Haebler, I., Hoffmann, L., Demus, J., & Badura-Skoda, P. Music for 2 pianos: Piano duets.

Chicago Style (17th ed.) Citation

Mozart, Wolfgang Amadeus, Ingrid Haebler, Ludwig Hoffmann, Jorg Demus, and Paul Badura-Skoda. Music for 2 Pianos: Piano Duets.

MLA (9th ed.) Citation

Mozart, Wolfgang Amadeus, et al. Music for 2 Pianos: Piano Duets.