APA Style
Elements of economics.. (1973.).
New York:
Macmilan Company.
Chicago Style
Elements of economics..
.
New York:
Macmilan Company,
1973..
Buku Teks.
MLA Style
Elements of economics..
.
New York:
Macmilan Company,
1973..
Buku Teks.
Turabian Style
Elements of economics..
New York:
Macmilan Company,
1973..
Buku Teks.