Massachusetts: Rockport Publishers,, 1997
Buku Teks
Plunkett, Drew, author
Laurence King, 2010
Buku Teks
Indecs Publishing, 1990
Buku Referensi
Whiton, Sherrill, author
HarperCollins, 1974
Buku Teks
Bliss, Sara, author
Page One Publishing, 2003
Buku Referensi