Levi, Maurice D., 1945-, author
McGraw-Hill, 1983
Buku Teks
Ellsworth, P.T., author
Macmillan, 1975
Buku Teks
Bhagwati, Jagdish, author
MIT Press, c1991
Buku Teks
Gilpin, Robert, author
Princeton University Press, 1987
Buku Teks
Balaam, David N., 1950-, author
Pearson Education, 2014
Buku Teks