NPR. (2013). Npr laughter therapy: A comedy collection for the chronically serious (Unabridged, Performance.). HighBridge Audio.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNPR. Npr Laughter Therapy: A Comedy Collection for the Chronically Serious. Unabridged, Performance. Prince Frederick: HighBridge Audio, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNPR. Npr Laughter Therapy: A Comedy Collection for the Chronically Serious. Unabridged, Performance. HighBridge Audio, 2013.
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