APA (7th ed.) Citation

Beethoven, L. v., & Gould, G. 6 bagatelles, op. 126.

Chicago Style (17th ed.) Citation

Beethoven, Ludwig van, and Glenn Gould. 6 Bagatelles, Op. 126.

MLA (9th ed.) Citation

Beethoven, Ludwig van, and Glenn Gould. 6 Bagatelles, Op. 126.

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