by John Grisham
New York Dell publishing 2001,
Buku Teks
Krims, Bonnie Rosser
Rockport Publishers,
Buku Referensi
Maugham, W. Somerset
New York: George H. Doran Company, c1925
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Xu, Chengbei
Intercontinental Press, 2010
Buku Teks
C.E. Tuttle Co,, 1962
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