Koh, C. S. (1991). Comparison of investment conditions in Singapore and Thailand with reference to a printed circuit board assembly company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Koh, Chit Seng. Comparison of Investment Conditions in Singapore and Thailand with Reference to a Printed Circuit Board Assembly Company. 1991.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Koh, Chit Seng. Comparison of Investment Conditions in Singapore and Thailand with Reference to a Printed Circuit Board Assembly Company. 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.