Howells, M. (1968). Life in letters of William Dean Howells. Russell.
芝加哥风格引文Howells, Mildred. Life in Letters of William Dean Howells. New York: Russell, 1968.
MLA引文Howells, Mildred. Life in Letters of William Dean Howells. Russell, 1968.
警告：这些引文格式不一定是100％准确.