Donald, Graeme
Simon & Schuster, 1994
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Cohen, John Michael, 1903-1989
Penguin Books, 1971
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Cohen, John Michael, 1903-1989
Allen Lane, 1980
Buku Referensi
Garner, Bryan A.
Oxford University Press, 1995
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Fowler, H.W. [Henry Watson], 1858-1933
New York Oxford University Press 1965
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