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Buku Teks
edited with introductions by Michael Bromley, Tom O'Malley
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McNair, Brian, author
A Member of the Hodder Headline Group, 1998
Buku Teks
C. Christhopher
Anmol Publicatioans PVT. ltd, 1997
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Ferguson, Donald L., author
National Textbook, 1994
Buku Teks