APA (7th ed.) Citation

Chopin, F., & Berg, C. Deux nocturnes op. 48.

Chicago Style (17th ed.) Citation

Chopin, Frédéric, and Clemens Berg. Deux Nocturnes Op. 48.

MLA (9th ed.) Citation

Chopin, Frédéric, and Clemens Berg. Deux Nocturnes Op. 48.

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