Twain, M. (1973). What is man? and Other Philosophical Writings. University of California Press.
シカゴスタイル引用形Twain, Mark. What Is Man? and Other Philosophical Writings. London: University of California Press, 1973.
MLA引用形式Twain, Mark. What Is Man? and Other Philosophical Writings. University of California Press, 1973.
警告: この引用は必ずしも正確ではありません.