Gras, N. S. B. (1967). The evolution of the English corn market, from the twelfth to the eighteenth century. Russell & Russell.
芝加哥风格引文Gras, Norman Scott Brien. The Evolution of the English Corn Market, from the Twelfth to the Eighteenth Century. New York: Russell & Russell, 1967.
MLA引文Gras, Norman Scott Brien. The Evolution of the English Corn Market, from the Twelfth to the Eighteenth Century. Russell & Russell, 1967.
警告：这些引文格式不一定是100％准确.