Yap, C. L. (1992). Industrial market segmentation: Case study of a company in the hypodermic needles and syringes business in Singapore.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Yap, Chew Loong. Industrial Market Segmentation: Case Study of a Company in the Hypodermic Needles and Syringes Business in Singapore. 1992.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Yap, Chew Loong. Industrial Market Segmentation: Case Study of a Company in the Hypodermic Needles and Syringes Business in Singapore. 1992.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.