Gaya APA
Economics. Principles, problem and policies. Thirteenth ed. (1996).
:
.
Gaya Chicago
Economics. Principles, problem and policies. Thirteenth ed.
.
:
,
1996.
Printed Book.
Gaya MLA
Economics. Principles, problem and policies. Thirteenth ed.
.
:
,
1996.
Printed Book.
Gaya Turabian
Economics. Principles, problem and policies. Thirteenth ed.
:
,
1996.
Printed Book.