Wilhide, Elizabeth
Tabori & Chang, 1998
Buku Teks
editors, Joseph De Chiara, Julius Panero, Martin Zelnik
McGraw-Hill, 2001
Buku Referensi
De Chiara, Joseph, 1929-
McGraw-Hill International Edition, 1991
Buku Referensi
Ballast, David Kent
Professional Publications, Inc., 2002
Buku Referensi
McGowan, Maryrose
John Wiley & Sons, 2003
Buku Referensi