Guarino, A. C. (2026). Greatness code: The formula behind unstoppable success. John Wiley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGuarino, Alan C. Greatness Code: The Formula Behind Unstoppable Success. Hoboken, New Jersey: John Wiley, 2026.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGuarino, Alan C. Greatness Code: The Formula Behind Unstoppable Success. John Wiley, 2026.
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