Sylvester II, P., & Lattin, H. P. (1961). The letters of Gerbert, with his papal privileges as Sylvester II. New York: Columbia University Press.
استشهاد بنمط شيكاغوSylvester II, Pope, و Harriet Pratt Lattin. The Letters of Gerbert, With His Papal Privileges As Sylvester II. New York: Columbia University Press, 1961.
MLA استشهادSylvester II, Pope, و Harriet Pratt Lattin. The Letters of Gerbert, With His Papal Privileges As Sylvester II. New York: Columbia University Press, 1961.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.