Acland, Henry W.
Routledge/Thoemmes Press, 1996
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Edwards, Edward
Routledge/Thoemmes Press, 1996
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Ambrose, Timothy
Routledge, 1995
Buku Teks SO
Woo, Kyu Sung
Rockport Publishers, 1999
Buku Teks SO
Edwards, Edward
Thoemmes Press, 1996
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