HEADDRICK, D. R. (1981). The Tools of empire: Technology andEuropean imperialism in the nineteenth century. O.U.Pr.
Chicago-čujuhus (17. p.)HEADDRICK, Daniel R. The Tools of Empire: Technology AndEuropean Imperialism in the Nineteenth Century. New York: O.U.Pr, 1981.
MLA-čujuhus (9. p.)HEADDRICK, Daniel R. The Tools of Empire: Technology AndEuropean Imperialism in the Nineteenth Century. O.U.Pr, 1981.
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