Hunt, Roberta, author
J.B. Lippincott, 1997
Buku Teks
edited by Dianne Watkins
Bailliere Tindall, 2003
Buku Teks
Williams, Cicely D., author
Oxford University Press, 1976
Buku Teks
Mott, Sandra R., author
Addison-Wesley, 1985
Buku Teks
Hart, R.H., author
World Health Organization, 1990
Buku Teks