Krupp, C. (2008). How not to look old: Fast and effortless ways to look 10 years younger, 10 pounds lighter, 10 times better. Springboard Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKrupp, Charla. How Not to Look Old: Fast and Effortless Ways to Look 10 Years Younger, 10 Pounds Lighter, 10 Times Better. New York: Springboard Press, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKrupp, Charla. How Not to Look Old: Fast and Effortless Ways to Look 10 Years Younger, 10 Pounds Lighter, 10 Times Better. Springboard Press, 2008.
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