Ul Islam, F. (1993). Upgrading of traditional retailing through a wholesaler sponsered voluntary chain: A case study of Econ Minimart in Singapore.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ul Islam, Faheem. Upgrading of Traditional Retailing Through a Wholesaler Sponsered Voluntary Chain: A Case Study of Econ Minimart in Singapore. 1993.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ul Islam, Faheem. Upgrading of Traditional Retailing Through a Wholesaler Sponsered Voluntary Chain: A Case Study of Econ Minimart in Singapore. 1993.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.