Whelan, Bride M., author
Rockport Publisher, 1994
Buku Teks
Whelan, Bride M.
Rockport Publishers, 1997
Multimedia
Whelan, Bride M.
Rockport Publishers, 1997
Multimedia
Michael, author
Chronicle Books, 2000
Buku Referensi
Linton, Harold, author
McGraw-Hill, 1999
Buku Teks