Orijinal: Summertime Sheet Music by Lou Stein. Lou Stein. George Gershwin , Ira Gershwin , Dorothy Heyward , DuBose Heyward. Solero.
Tercüme: George Gershwin, Ira Gershwin, Dorothy Heyward'ın DuBose Heyward'ın. Porgy ve Bess. Alfred Yayıncılık A.Ş.. 192.900.908-9. Piyano Solo.