Case, Karl E., author
Prentice-Hall, 1992
Buku Teks
Mankiw, N. Gregory, author
South-Western Cengage Learning, 2012
Buku Teks
Melvin, Michael, author
South Western Cengage Learning, 2013
Buku Teks
Burns, Arthur Edward, author
Harcourt, Brace, 1948
Buku Teks
Bade, Robin, author
Pearson, 2013
Buku Teks