Letwin, S. R. (1965). The pursuit of certainty. at the university Press.
シカゴスタイル引用形Letwin, Shirley Robin. The Pursuit of Certainty. Cambridge: at the university Press, 1965.
MLA引用形式Letwin, Shirley Robin. The Pursuit of Certainty. at the university Press, 1965.
警告: この引用は必ずしも正確ではありません.