Mooney, Gavin H., author
Prentice-Hall, 1992
Buku Teks
World Health Organization, 1983
Buku Teks
Walters, Vivienne J., author
Croom Helm, 1980
Buku Teks
Fry, John, 1922-
MTP Press , 1978
Buku Teks
McDonald, Ruth, author
Open University Press, 2002
Buku Teks