Cita APA (7a ed.)

Beethoven, L. v., Schreier, P., & Olbertz, W. (2007). Songs: I. Brilliant classics.

Cita Chicago Style (17a ed.)

Beethoven, Ludwig van, Peter Schreier, y Walter Olbertz. Songs: I. [Leeuwarden, The Netherlands]: Brilliant classics, 2007.

Cita MLA (9a ed.)

Beethoven, Ludwig van, et al. Songs: I. Brilliant classics, 2007.