Pyle, H., Johnson, M. D. V., & Dowd, F. J. (1923). Howard Pyle's book of the American spirit: The romance of American history. Harper & Brothers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPyle, Howard, Merle De Vore Johnson, और Francis J. Dowd. Howard Pyle's Book of the American Spirit: The Romance of American History. New York, London: Harper & Brothers, 1923.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPyle, Howard, et al. Howard Pyle's Book of the American Spirit: The Romance of American History. Harper & Brothers, 1923.
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