HEADDRICK, D. R. (1981). The Tools of empire: Technology andEuropean imperialism in the nineteenth century. O.U.Pr.
Chicago Style (17. basım) AtıfHEADDRICK, Daniel R. The Tools of Empire: Technology AndEuropean Imperialism in the Nineteenth Century. New York: O.U.Pr, 1981.
MLA (9th ed.) AtıfHEADDRICK, Daniel R. The Tools of Empire: Technology AndEuropean Imperialism in the Nineteenth Century. O.U.Pr, 1981.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..