World Health Organization, 2002
Buku Teks
Gerlach, Mary Jo Mirlenbrink
Delmar, Cengage Learning, 2014
Buku Teks
Mara, Cynthia Massie, editor; Olson, Laura Katz, editor
CRC Press, 2008
Buku Referensi
Pratt, John R.
Jones & Bartlett Learning, 2010
Buku Teks
Sorrentino, Sheila A.
Elsevier Mosby, 2011
Buku Teks