Kassirsky, I., author
Peace Publisher, [Date of publication not identified]
Buku Referensi
American Public Health Association, 2015
Buku Teks
Adams, A.R.D., author
Blackwell Scientific Publications, 1966
Buku Teks
Spicer, John W., author
Churchill Livingstone Elsevier, 2008
Buku Teks
Wright, William F. (William Floyd), author
Demos, 2013
Buku Teks