Walter, Ingo, author
John Wiley & Sons, 1981
Buku Teks
Krugman, Paul R., author
Pearson Education , 2014
Buku Teks
Krugman, Paul R., author
Pearson, 2009
Buku Teks
Bhagwati, Jagdish, author
MIT Press, c1991
Buku Teks
Krugman, Paul R., author
Harper Collins Publishers , 1991
Buku Teks