Henderson, Justin, author
Rockport, 2003
Buku Teks SO
Aurora Cuito, Alejandro Bahamón, Wendy Griswold
HBI, 2001
Buku Teks
edited by martin Nicholas Kunz
teNeues, 2003
Buku Teks
Dittrich, Guy, editor
teNeues, 2006
Buku Referensi
Epstein, Adam, author
Pearson/Prentice Hall, 2006
Buku Teks