Wilhide, Elizabeth, author
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Buku Referensi
McGowan, Maryrose, author
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Buku Teks
McGowan, Maryrose, author
John Wiley & Sons, 1996
Buku Teks
Hasegawa, Noriyoshi, author
Prgeone, 2006
Buku Teks
Dean, Corinna
Rockport Publishers, 2000.
Buku Teks