Dever, G. E. Alan
Aspen Systems Corp., 1980
Buku Teks
Grundy, Fred
HK Lewis, 1974
Buku Teks
by Ministry of Health Republic of Indonesia
Departemen Kesehatan, 1990
Buku Teks
World Health Organization, 1996
Buku Teks
Williams, Cicely D.
WABA, 2006
Buku Teks