Goetzmann, W. H. (1966). Exploration and empire: The explorer and the scientist in the winning of the American West ([1st ed.].). Knopf.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGoetzmann, William H. Exploration and Empire: The Explorer and the Scientist in the Winning of the American West. [1st ed.]. New York: Knopf, 1966.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGoetzmann, William H. Exploration and Empire: The Explorer and the Scientist in the Winning of the American West. [1st ed.]. Knopf, 1966.
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