Alhaji Dauda, S. (2013). Assessment of willingness to pay for drinking water quality improvement and supply services among households in Damaturu, Nigeria.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Alhaji Dauda, Suleiman. Assessment of Willingness to Pay for Drinking Water Quality Improvement and Supply Services Among Households in Damaturu, Nigeria. 2013.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Alhaji Dauda, Suleiman. Assessment of Willingness to Pay for Drinking Water Quality Improvement and Supply Services Among Households in Damaturu, Nigeria. 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.