Usman Abdullahi , U. (2021). Geochemistry and remediation of Fe, Mn, and as in groundwater from quaternary alluvium, lower Kelantan Basin, North-Eastern Coast of Peninsular Malaysia / Usman Abdullahi Usman.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Usman Abdullahi , Usman. Geochemistry and Remediation of Fe, Mn, and as in Groundwater from Quaternary Alluvium, Lower Kelantan Basin, North-Eastern Coast of Peninsular Malaysia / Usman Abdullahi Usman. 2021.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Usman Abdullahi , Usman. Geochemistry and Remediation of Fe, Mn, and as in Groundwater from Quaternary Alluvium, Lower Kelantan Basin, North-Eastern Coast of Peninsular Malaysia / Usman Abdullahi Usman. 2021.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.