APA (7th ed.) Citation

Beethoven, L. v. Sechs Streichquartette op. 18. Philips.

Chicago Style (17th ed.) Citation

Beethoven, Ludwig van. Sechs Streichquartette Op. 18. [S.l.]: Philips.

MLA (9th ed.) Citation

Beethoven, Ludwig van. Sechs Streichquartette Op. 18. Philips.

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