Sullivan, D. (2023). 10x is easier than 2x (Unabridged.). Hay House Business.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSullivan, Dan. 10x Is Easier than 2x. Unabridged. New York: Hay House Business, 2023.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSullivan, Dan. 10x Is Easier than 2x. Unabridged. Hay House Business, 2023.
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