NGO Forum for Drinking Water Supply and Sanitation (Bangladesh) & Halder, J. (2003). Counting on catalysts. NGO Forum for Drinking Water Supply & Sanitation.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)NGO Forum for Drinking Water Supply and Sanitation (Bangladesh) و Joseph Halder. Counting on Catalysts. Dhaka: NGO Forum for Drinking Water Supply & Sanitation, 2003.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)NGO Forum for Drinking Water Supply and Sanitation (Bangladesh) و Joseph Halder. Counting on Catalysts. NGO Forum for Drinking Water Supply & Sanitation, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.