Dyfyniad APA

Gershwin, G., Gershwin, I., & Heyward, D. (1992). Selections from Porgy and Bess. Warner Bros. Publications.

Dyfyniad Arddull Chicago

Gershwin, George, Ira Gershwin, and DuBose Heyward. Selections from Porgy and Bess. Secaucus, N.J.: Warner Bros. Publications, 1992.

Dyfyniad MLA

Gershwin, George, et al. Selections from Porgy and Bess. Warner Bros. Publications, 1992.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.