Clinard, Marshall B. (Marshall Barron), author
John Wiley & Sons, 1973
Buku Teks
UNICEF, 1963
Buku Teks
Newbrander, William, author
World Health Organization, 1992
Buku Teks
David Zilberman, Joachim Otte, David Roland-Holst, Dirk Pfeiffer, editors
[Springer, ], 2012
eBooks
Julia Hussein, Affette McCaw-Binns, and Roger Webber.
CABI, 2012
Buku Teks