Heath, D. (2020). Upstream: The quest to solve problems before they happen (First Avid Reader Press hardcover edition.). Avid Reader Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHeath, Dan. Upstream: The Quest to Solve Problems Before They Happen. First Avid Reader Press hardcover edition. New York: Avid Reader Press, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHeath, Dan. Upstream: The Quest to Solve Problems Before They Happen. First Avid Reader Press hardcover edition. Avid Reader Press, 2020.
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