Gaya APA
Economics In Action. (1969).
California:
Wadsworth.
Gaya Chicago
Economics In Action.
.
California:
Wadsworth,
1969.
.
Gaya MLA
Economics In Action.
.
California:
Wadsworth,
1969.
.
Gaya Turabian
Economics In Action.
California:
Wadsworth,
1969.
.