Viotti, Paul R
Longman, 2012
Buku Teks
Schachter, Oscar, 1915-, author
Martinus Nijhoff , 1991
Buku Teks
Chacholiades, Miltiades, author
McGraw-Hill, 1978
Buku Teks
Krugman, Paul R., author
Addison-Wesley , 1997
Buku Teks
Krugman, Paul R., author
Scott, Foresman, 1988
Buku Teks