Helm, Ann, author
Lippincott Eilliams & Wilkin , 2003
Buku Teks
Northrop, Cyhthia E
Mosby , 1987
Buku Teks
McHale, Jean, author
Churchill Livingstone, 2007
Buku Teks
Guido, Ginny Wacker, author
Prentice-Hall, 2006
Buku Teks
Staunton, Patricia J., author
W.B. Saunders , 1999
Buku Teks