Bhagwati, Jagdish, author
MIT Press, c1991
Buku Teks
Gilpin, Robert, author
Princeton University Press, 1987
Buku Teks
SAGE Reference, 2011
Buku Referensi
Balaam, David N., 1950-, author
Pearson Education, 2014
Buku Teks
Oatley, Thomas, author
Pearson, 2012
Buku Teks