Fairchild, Fred Rogers, author
Macmillan, 1954
Buku Teks
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
Mankiw, N. Gregory, author
Cengage Learning, 2013
Buku Teks