Gaya APA
Study Guide To Accompany Economics. (1990).
Amerika:
MCGraw Hill Book Company.
Gaya Chicago
Study Guide To Accompany Economics.
Ed. 11.
Amerika:
MCGraw Hill Book Company,
1990.
.
Gaya MLA
Study Guide To Accompany Economics.
Ed. 11.
Amerika:
MCGraw Hill Book Company,
1990.
.
Gaya Turabian
Study Guide To Accompany Economics.
Amerika:
MCGraw Hill Book Company,
1990.
.