Pierce, S. (2020). Sleep disorders: What keeps people up at night? Lucent Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPierce, Simon. Sleep Disorders: What Keeps People Up at Night? New York, NY: Lucent Press, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPierce, Simon. Sleep Disorders: What Keeps People Up at Night? Lucent Press, 2020.
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