Murphy, Beverly, author
McGraw-Hill, 2005
Buku Referensi
Hall, Dinah
Rizzoli, , 1992
Buku Teks
Wilhide, Elizabeth, author
Conran Octopus, 1998
Buku Referensi
Livingston, Kathryn
Rockport Publishers, 1999
Buku Teks
Hammer, Nelson R., author
Rockport, 1999
Buku Teks