Yap, C. L. (1994). A study on the relationship between portfolio's risk and return in various sectors on Kuala Lumpur Stock Exchange.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Yap, Cheng Long. A Study on the Relationship Between Portfolio's Risk and Return in Various Sectors on Kuala Lumpur Stock Exchange. 1994.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Yap, Cheng Long. A Study on the Relationship Between Portfolio's Risk and Return in Various Sectors on Kuala Lumpur Stock Exchange. 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.