Krugman, Paul R., author
Addison-Wesley , 1997
Buku Teks
Krugman, Paul R., author
Harper Collins Publishers , 1991
Buku Teks
Krugman, Paul R., author
Scott, Foresman, 1988
Buku Teks
Krugman, Paul R., author
Harper Collins , 1994
Buku Teks
Copeland, Thomas E., author
Addison-Wesley, 1983
Buku Teks