APA (7th ed.) Citation

Porpora, N., Alan, J. D., Dessauer, H., & Vieland, J. Sonata no. 9 in E major: For viola and piano.

Chicago Style (17th ed.) Citation

Porpora, Nicola, Jean Delphin Alan, Heinrich Dessauer, and Joseph Vieland. Sonata No. 9 in E Major: For Viola and Piano.

MLA (9th ed.) Citation

Porpora, Nicola, et al. Sonata No. 9 in E Major: For Viola and Piano.