Wilson, Graham S., Sir, author
The Athlone Press, University of London, 1967
Buku Teks
Marcel B. M. Teunissen, editor
[, Springer-Verlag], 2012
eBooks
USAID, 2003
Buku Teks
Lisa Perikani, author
2018
UI - Skripsi (Membership)
National Communicable Disease Center, 1967
Buku Teks