Independence Educational , 1994
Buku Teks
Snyder, Mariah, author
Springer, 2002
Buku Teks
Novey, Donald W, author
Mosby, 2000
Buku Teks
Weisman, Roanne, author
Health Communications, Inc, 2003
Buku Teks
Rosenfeld, Isadore, author
Random House, 1996
Buku Referensi