Rom, William N.
Jossey- Bass, 2012
Buku Teks
Colin D. Butler, editor
CABI, 2016
Buku Teks
World Health Organization, 2003
Buku Teks
Fernando, H.J.S., editor
Springer, 2012
eBooks
edited by Mindel C. Sheps and Jeanne Clare Ridley
University of Pittsburgh Press, 1965
Buku Teks