Schuster, M. L. (1941). A treasury of the world's great letters from ancient days to our own time: Containing the characteristic and crucial communications, and intimate exchanges and cycles of correspondence, of many of the outstanding figures of world history, and some notable contemporaries. London: William Heinemann.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Schuster, Max Lincoln. A Treasury of the World's Great Letters from Ancient Days to Our Own Time: Containing the Characteristic and Crucial Communications, and Intimate Exchanges and Cycles of Correspondence, of Many of the Outstanding Figures of World History, and Some Notable Contemporaries. London: William Heinemann, 1941.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Schuster, Max Lincoln. A Treasury of the World's Great Letters from Ancient Days to Our Own Time: Containing the Characteristic and Crucial Communications, and Intimate Exchanges and Cycles of Correspondence, of Many of the Outstanding Figures of World History, and Some Notable Contemporaries. London: William Heinemann, 1941.