Crawford, R. (2019). Summertime: George Gershwin's life in music (First edition.). W. W. Norton & Company.
Chicago-viite (17. p.)Crawford, Richard. Summertime: George Gershwin's Life in Music. First edition. New York: W. W. Norton & Company, 2019.
MLA-viite (9. p.)Crawford, Richard. Summertime: George Gershwin's Life in Music. First edition. W. W. Norton & Company, 2019.
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