Kosters, Marvin H., author
American Enterprise Institute for Public Policy Research, 1975
Buku Teks
Hart, Albert Gailord, 1909-, author
Twentieth Century Fund, 1953
Buku Teks
Potter, Pitman B.
University Of Washington Press, 1992
Buku Teks
Peking Foreign Language, 1950
Buku Teks
Buku Teks