Downey, Jake
Sterling Pub, 1982
Buku Teks
Downey, Jake
Inggris EP Publishing 1982,
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Bass, Carol
Stewart, Tabori & Chang, 2008
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Brooke, Margaret
Dorling Kindersley Publishing, INC, 2000
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Toft, Carolyn Hewes
Landmarks , 1988
Buku Teks