Fairchild, Fred Rogers, author
Macmillan, 1954
Buku Teks
Buku Teks
Case, Karl E., author
Prentice-Hall, 1992
Buku Teks
Mankiw, N. Gregory, author
[publisher not identified], [date of publication not identified]
Buku Teks
Mankiw, N. Gregory, author
South-Western Cengage Learning, 2012
Buku Teks