APA (7th ed.) Citation

Gershwin, G., & Heyward, D. (1935). Porgy and Bess. Gershwin Pub.

Chicago Style (17th ed.) Citation

Gershwin, George, and DuBose Heyward. Porgy and Bess. New York: Gershwin Pub, 1935.

MLA (9th ed.) Citation

Gershwin, George, and DuBose Heyward. Porgy and Bess. Gershwin Pub, 1935.