Reynolds, G. (2012). The first 20 minutes: Surprising science reveals how we can exercise better, train smarter, live longer. Hudson Street Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रReynolds, Gretchen. The First 20 Minutes: Surprising Science Reveals How We Can Exercise Better, Train Smarter, Live Longer. New York: Hudson Street Press, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रReynolds, Gretchen. The First 20 Minutes: Surprising Science Reveals How We Can Exercise Better, Train Smarter, Live Longer. Hudson Street Press, 2012.
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