James A. Johnson, Carleen H. Stoskopf
Jones and Bartlett Publishers, 2010
Buku Teks
Ducanis, Alex J., author
Aspen Publication, 1979
Buku Teks
World Health Organization, 1988
Buku Teks
Leathard, Audrey, author
Chapman & Hall, 1993
Buku Teks
edited by Joseph M. Kasonde, John D. Martin
World Health Organization, 1994
Buku Teks