Crawford, R., & Colacci, D. (2019). Summertime: George gershwin's life in music (Unabridged.). HighBridge Audio.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCrawford, Richard, और David Colacci. Summertime: George Gershwin's Life in Music. Unabridged. Prince Frederick: HighBridge Audio, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCrawford, Richard, और David Colacci. Summertime: George Gershwin's Life in Music. Unabridged. HighBridge Audio, 2019.
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