Haggard, H. W. (1937). Staying young beyond your years. Funk and Wagnalls company.
芝加哥风格引文Haggard, Howard Wilcox. Staying Young Beyond Your Years. New York: Funk and Wagnalls company, 1937.
MLA引文Haggard, Howard Wilcox. Staying Young Beyond Your Years. Funk and Wagnalls company, 1937.
警告：这些引文格式不一定是100％准确.