Twain, M., & Leary, L. (1961). Mark Twain's Letters to Mary. Columbia University Press.
芝加哥风格引文Twain, Mark, 与 Lewis Leary. Mark Twain's Letters to Mary. New York: Columbia University Press, 1961.
MLA引文Twain, Mark, 与 Lewis Leary. Mark Twain's Letters to Mary. Columbia University Press, 1961.
警告：这些引文格式不一定是100％准确.