Mankiw, N. Gregory, author
Harcout College, 1998
Buku Teks
Case, Karl E., author
Prentice-Hall, 2004
Buku Teks
Case, Karl E., author
Prentice-Hall, 1996
Buku Teks
Case, Karl E., author
Prentice-Hall, 2002
Buku Teks
Case, Karl E., author
Prentice-Hall, 1999
Buku Teks