APA (7th ed.) Citation

Gershwin, G., Heyward, D., Gershwin, I., & Sirmay, A. (1962). Porgy and Bess (Vocal score.). Warner Brothers.

Chicago Style (17th ed.) Citation

Gershwin, George, DuBose Heyward, Ira Gershwin, and Albert Sirmay. Porgy and Bess. Vocal score. Miami, Fla: Warner Brothers, 1962.

MLA (9th ed.) Citation

Gershwin, George, et al. Porgy and Bess. Vocal score. Warner Brothers, 1962.