research director, Carl Shoup
Twentieth Century Fund, 1937
Buku Teks
Bittker, Boris I., author
Federal Tax Press, 1968
Buku Teks
Eljinah Anderson, editor ; Dougkas S. Massey, editor
Ruseel sage foundation, 2001
Buku Teks
United Nations, 1970
Buku Teks
Iwata, Kazumasa, author
Tokyo Dept. of Social and International Relations,University of Tokyo, 1994
Buku Teks