(1949). Pursuit of happiness: A primer for modern living. Spero Foundation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPursuit of Happiness: A Primer for Modern Living. New York: Spero Foundation, 1949.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPursuit of Happiness: A Primer for Modern Living. Spero Foundation, 1949.
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