Gaya APA
Exploring Economics. (1984).
Amerika:
Scott, Foresman And Company.
Gaya Chicago
Exploring Economics.
.
Amerika:
Scott, Foresman And Company,
1984.
.
Gaya MLA
Exploring Economics.
.
Amerika:
Scott, Foresman And Company,
1984.
.
Gaya Turabian
Exploring Economics.
Amerika:
Scott, Foresman And Company,
1984.
.