Haggard, H. W. (1937). Staying young beyond your years. Funk and Wagnalls company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHaggard, Howard Wilcox. Staying Young Beyond Your Years. New York: Funk and Wagnalls company, 1937.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHaggard, Howard Wilcox. Staying Young Beyond Your Years. Funk and Wagnalls company, 1937.
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