Hill, R. L., & Toniolo, E. (1975). The Opening of the Nile Basin: Writings by members of the Catholic Mission to Central Africa on the geography and ethnography of the Sudan, 1842-1881. Barnes & Noble Books.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hill, Richard Leslie, و Elias Toniolo. The Opening of the Nile Basin: Writings by Members of the Catholic Mission to Central Africa on the Geography and Ethnography of the Sudan, 1842-1881. New York: Barnes & Noble Books, 1975.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hill, Richard Leslie, و Elias Toniolo. The Opening of the Nile Basin: Writings by Members of the Catholic Mission to Central Africa on the Geography and Ethnography of the Sudan, 1842-1881. Barnes & Noble Books, 1975.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.