Helm, L. (2011). Ramble at the Ryman. Dirt Farmer Music : Distributed by Vanguard Records.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHelm, Levon. Ramble at the Ryman. [S.l.] : Santa Monica, CA: Dirt Farmer Music : Distributed by Vanguard Records, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHelm, Levon. Ramble at the Ryman. Dirt Farmer Music : Distributed by Vanguard Records, 2011.
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