APA (7th ed.) Citation

Ligeti, G., & Biret, I. (2003). Etudes, books I and II. Naxos.

Chicago Style (17th ed.) Citation

Ligeti, György, and Idil Biret. Etudes, Books I and II. [Place of publication not identified]: Naxos, 2003.

MLA (9th ed.) Citation

Ligeti, György, and Idil Biret. Etudes, Books I and II. Naxos, 2003.