Ballenger, James C., author
Mosby , 2003
Buku Teks
Branddom, Randall L., author
W.B. Saunders, 1996
Buku Teks
Gavin Andrews, Mark Creamer, Rocco Crino, Caroline Hunt, Lisa Lampe, Andrew Page
Cambridge University Press, 2003
Buku Referensi
Blackwell Publishing, 2003
Buku Teks
Chang, David W., author
Thomson/Delmar Learning, 2006
Buku Teks