Gaya APA
Economics a Text With Included Readings. (1973).
California:
Goodyear.
Gaya Chicago
Economics a Text With Included Readings.
Cet.2.
California:
Goodyear,
1973.
.
Gaya MLA
Economics a Text With Included Readings.
Cet.2.
California:
Goodyear,
1973.
.
Gaya Turabian
Economics a Text With Included Readings.
California:
Goodyear,
1973.
.