Krugman, Paul R., author
Scott, Foresman, 1988
Buku Teks
Krugman, Paul R., author
Addison-Wesley, 2000
Buku Teks
Krugman, Paul R., author
Pearson Education , 2014
Buku Teks
Krugman, Paul R., author
Harper Collins Publishers , 1991
Buku Teks
Friedrich, Klaus
McGraw-Hill Kogakusha, 1974
Buku Teks
Krugman, Paul R., author
Harper Collins , 1994
Buku Teks