Charan, R., & Willigan, G. (2007). Know-How: The 8 Skills that Separate People Who Perform from Those Who Don't. Random House Business Books.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Charan, Ram, و Geri Willigan. Know-How: The 8 Skills That Separate People Who Perform from Those Who Don't. London: Random House Business Books, 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Charan, Ram, و Geri Willigan. Know-How: The 8 Skills That Separate People Who Perform from Those Who Don't. Random House Business Books, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.