Ngonga, F. L. (2006). High performance business strategies and techniques practice by successful large private service enterprise in Nairobi. Daystar University.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ngonga, Francis Lasalo. High Performance Business Strategies and Techniques Practice by Successful Large Private Service Enterprise in Nairobi. Nairobi: Daystar University, 2006.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Ngonga, Francis Lasalo. High Performance Business Strategies and Techniques Practice by Successful Large Private Service Enterprise in Nairobi. Daystar University, 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.