McNeill, Desmond
Croom Helm, 1981
Buku Teks
Black, Lloyd D.
D. Van Nostrand Company, Inc., 1968
Buku Teks
Penguin Books , 1970
Buku Teks
Wolf, Charles
Princeton University Press , 1960
Buku Teks
Mason, Edward S.
Published for the Council on Foreign Relations by Harper & Row, 1964
Buku Teks