Northup, C. S. (1970). A bibliography of Thomas Gray. Russell & Russell.
芝加哥风格引文Northup, Clark Sutherland. A Bibliography of Thomas Gray. New York: Russell & Russell, 1970.
MLA引文Northup, Clark Sutherland. A Bibliography of Thomas Gray. Russell & Russell, 1970.
警告：这些引文格式不一定是100％准确.