Cita APA (7th ed.)

Gershwin, G., & Gershwin, I. (1964). Things are looking up. Alfred Publishing Co., Inc..

Cita Chicago (17th ed.)

Gershwin, George, i Ira Gershwin. Things Are Looking Up. Louisville, United States: Alfred Publishing Co., Inc., 1964.

Cita MLA (9th ed.)

Gershwin, George, i Ira Gershwin. Things Are Looking Up. Alfred Publishing Co., Inc., 1964.