Storey, Sally
Quadrille Publishing Limited, 2000
Buku Referensi
Wilhide, Elizabeth
Tabori & Chang, 1998
Buku Teks
Szenasy, Susan S.
Running Press, 1986
Buku Referensi
Whitehead, Randall
Rockport, 1998
Buku Teks
Egan, M. David
McGraw-Hill, 1983
Buku Referensi