Johnson, Joyce Young, author
Lippincott , 1998
Buku Teks
Skolnik, Lisa, author
Rockport Publisher, 2001
Buku Referensi
Walsh, Joleen, author
J.B. Lippincott, 1987
Buku Teks
Rice, Robyn, author
Mosby , 1996
Buku Teks
Zang, Sheryl Mara, author
EGC, 2003
Buku Teks