Huzzar, George B, De
Thomas Y.Crowell Company, 1955
Buku Teks
Foreign Language, 1960
Buku Teks
Oxford University Press, 1951
Buku Teks
Brzezinski, Zbigniev K., author
Frederick A. Praeger, 1962
Buku Teks
edited by Donald S. Zagoria
Yale University Press, 1982
Buku Teks