APA (7th ed.) Citation

Dvorak, A. Op. 51, string quartet in E flat major. N. Simrock's Ed.

Chicago Style (17th ed.) Citation

Dvorak, Antonin. Op. 51, String Quartet in E Flat Major. London: N. Simrock's Ed.

MLA (9th ed.) Citation

Dvorak, Antonin. Op. 51, String Quartet in E Flat Major. N. Simrock's Ed.