Copestick, Joanna, author
Page One , 1998
Buku Referensi
Miller, Marry C., author
Wiley, 1997
Buku Teks
Livingston, Kathryn
Rockport Publishers, 1999
Buku Teks
Livingston, Kathryn
Rockport Publishers, 1999
Buku Teks
Sawahata, Lesa, author
Rockport, 2001
Buku Teks