APA (7th ed.) Citation

Gershin, G. Gershwin: Porgy & Bess etc. s.n.].

Chicago Style (17th ed.) Citation

Gershin, George. Gershwin: Porgy & Bess Etc. [S.l: s.n.].

MLA (9th ed.) Citation

Gershin, George. Gershwin: Porgy & Bess Etc. s.n.].

Warning: These citations may not always be 100% accurate.