Van der Hart, W., & Waller, R. (2013). The end of worry: Why we worry and how to stop (1st Howard Books trade pbk. ed.). Howard Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVan der Hart, Will, और Rob Waller. The End of Worry: Why We Worry and How to Stop. 1st Howard Books trade pbk. ed. New York: Howard Books, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVan der Hart, Will, और Rob Waller. The End of Worry: Why We Worry and How to Stop. 1st Howard Books trade pbk. ed. Howard Books, 2013.
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