APA (7th ed.) Citation

Gershwin, G., Gershwin, G., & Gershwin, G. (1984). Rhapsody in blue. Dt. Grammophon.

Chicago Style (17th ed.) Citation

Gershwin, George, George Gershwin, and George Gershwin. Rhapsody in Blue. Hamburg: Dt. Grammophon, 1984.

MLA (9th ed.) Citation

Gershwin, George, et al. Rhapsody in Blue. Dt. Grammophon, 1984.