edited by Richard A. Crosby, Monica L. Wendel, Robin C. Vanderpool, Baretta R. Casey
Jossey-Bass, 2012
Buku Teks
Margai, Florence M.
Earthscan , 2010
Buku Teks
Kebede-Francis, Enku
Jones & Bartlett learning, 2011
Buku Teks
Artikel Jurnal
World Health Organization
Regional Office for South-East Asia, 1989
Buku Teks