Raymond, Jack, 1918-2007
Harper & Row Publishers, 1964
Buku Teks
World Health Organizaion, Regional Office for South-East Asia, 1988
Buku Teks
Minimum, 2010
Buku Teks
Peffer, Nathaniel, author
University of Michigan Press, 1958
Buku Teks
Quigley, Harold S., author
World Peace Foundation, 1938
Buku Teks