APA (7th ed.) Citation

Beethoven, L. v. (1977). The early quartets, op. 18, nos. 1-6. Philips.

Chicago Style (17th ed.) Citation

Beethoven, Ludwig van. The Early Quartets, Op. 18, Nos. 1-6. Philips, 1977.

MLA (9th ed.) Citation

Beethoven, Ludwig van. The Early Quartets, Op. 18, Nos. 1-6. Philips, 1977.

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