Youngkin, Ellis Quinn
Appleton & Lange , 1998
Buku Teks
Richardson, Paul
Aga Khan Univ.-URCCHS, 1993
Buku Teks
Chapman & Hall Medical, 1993
Buku Teks
World Health Organization
World Health Organization, 1990
Buku Teks SO
Abbatt, Fred
World Health Organization , 1980
Buku Teks