Bailliere Tindall , 2000
Buku Teks
Rawlins, Ruth Parmelee, author
Mosby , 1993
Buku Teks
edited by Charlie Brooker and Julie Repper
Balliere Tindall, 1998
Buku Teks
Varcarolis, Elizabeth M., author
Saunders Elsevier, 2006
Buku Teks
Clinton, Michael
Sydney Prentice Hall 1996 ,
Buku Teks