O`Rourke, Kevin, author
Allen & Unwin, 2002
Buku Teks
Morgenthau, Hans J., author
Knopf , 1954
Buku Teks
Hayton, Bill, author
Yale University Press, 2014
Buku Teks
Shannon, William V., author
Macmillan, 1967
Buku Teks
Spring, Joel
McGraw-Hill, 2002
Buku Teks