Rugaya Mohamad Gaus. (2000). A study of leardership and motivation in US multinational corporations operating in Singapore. International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Rugaya Mohamad Gaus. A Study of Leardership and Motivation in US Multinational Corporations Operating in Singapore. Gombak, Selangor: International Islamic University Malaysia, 2000.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Rugaya Mohamad Gaus. A Study of Leardership and Motivation in US Multinational Corporations Operating in Singapore. International Islamic University Malaysia, 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.