Blackwell, 1993
Buku Teks
Campion, H.
Oxford University Press, 1939
Buku Teks
edited, Peter Catterall
Institute of Contemporary British History, 1990
Buku Teks
Griffin, Gabriele
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Buku Teks
Lenin, Vladimir I.
Foreign Languages Publishing House , [date of publication not identified]
Buku Teks