APA (7 वां संस्करण) प्रशस्ति पत्र
Lutz, R. A. (2003). Guts: 8 laws of business from one of the most innovative business leaders of our time (2nd ed.). Wiley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Lutz, Robert A. Guts: 8 Laws of Business from One of the Most Innovative Business Leaders of Our Time. 2nd ed. Hoboken, NJ: Wiley, 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Lutz, Robert A. Guts: 8 Laws of Business from One of the Most Innovative Business Leaders of Our Time. 2nd ed. Wiley, 2003.
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