edited by Gordon Greenwood and Norman Harper
F.W. Chesire, 1968
Buku Teks
Edited by Kajima Institute of International Peace.
Japan Times, 1971
Buku Referensi
Cheshire, 1974
Buku Teks
Stebbins, Richard P., author
Harper & Row, 1963
Buku Teks
Plischke, Elmer
American Enterprise Institute for Public Policy Research, 1977
Buku Teks