Cita APA

Gershwin, G. 1., & Portnoff, M. 1. (1956). George Gershwin piano duets. U.S.A.: Chappell & Co. Inc..

Citación estilo Chicago

Gershwin, George 1898-1937, y Mischa 1901-1979 Portnoff. George Gershwin Piano Duets. U.S.A.: Chappell & Co. Inc., 1956.

Cita MLA

Gershwin, George 1898-1937, y Mischa 1901-1979 Portnoff. George Gershwin Piano Duets. U.S.A.: Chappell & Co. Inc., 1956.