(1987). Thinkers of the twentieth century. Chicago: St. James Press.
Trích dẫn kiểu ChicagoThinkers of the Twentieth Century. Chicago: St. James Press, 1987.
MLA引文Thinkers of the Twentieth Century. Chicago: St. James Press, 1987.
警告：这些引文格式不一定是100％准确.