Lipsey, Richard G., 1928-, author
Harper & Row , 1988
Buku Teks
Holt, Renehart and Winston , 1971
Buku Teks
Blanchard, Olivier, author
Pearson, 2009
Buku Teks
Blanchard, Oliver, author
Prentice-Hall, 1997
Buku Teks
Mankiw, N. Gregory, author
Worth, 1994
Buku Teks