Gutfeld, G. (2020). The plus: Self-help for people who hate self-help (First Threshold Editions hardcover edition.). Threshold Editions.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGutfeld, Greg. The Plus: Self-help for People Who Hate Self-help. First Threshold Editions hardcover edition. New York: Threshold Editions, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGutfeld, Greg. The Plus: Self-help for People Who Hate Self-help. First Threshold Editions hardcover edition. Threshold Editions, 2020.
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