APA (7th ed.) Citation

Chopin, F., & Smendzianka, R. Berceuse Des-Dur (in D flat major) op. 57.

Chicago Style (17th ed.) Citation

Chopin, Frédéric, and Regina Smendzianka. Berceuse Des-Dur (in D Flat Major) Op. 57.

MLA (9th ed.) Citation

Chopin, Frédéric, and Regina Smendzianka. Berceuse Des-Dur (in D Flat Major) Op. 57.

Warning: These citations may not always be 100% accurate.