Headrick, D. R. (1981). The tools of empire: Technology and European imperialism in the nineteenth century. Oxford: Oxford University Press.
Dyfyniad Arddull ChicagoHeadrick, Daniel R. The Tools of Empire: Technology and European Imperialism in the Nineteenth Century. Oxford: Oxford University Press, 1981.
Dyfyniad MLAHeadrick, Daniel R. The Tools of Empire: Technology and European Imperialism in the Nineteenth Century. Oxford: Oxford University Press, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.