MLA

Chopin, Frédéric, and Alfred Cortot. 24 Études: Opus 10 Et 25. France: His Master's Voice, 1955.

APA

Chopin, F., & Cortot, A. (1955). 24 Études: Opus 10 et 25. France: His Master's Voice.

Chicago

Chopin, Frédéric, and Alfred Cortot. 24 Études: Opus 10 Et 25. France: His Master's Voice, 1955.