Williamson, J. (1940). The Life and Growth of the British Empire. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Williamson, J.A. The Life and Growth of the British Empire. London [u.a.]: Oxford University Press, 1940.
Lua MLA (8ú heag.)Williamson, J.A. The Life and Growth of the British Empire. Oxford University Press, 1940.
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