Gaya APA
Economics : A Text With Readings. (1978).
:
.
Gaya Chicago
Economics : A Text With Readings.
Ed.III.
:
,
1978.
Text.
Gaya MLA
Economics : A Text With Readings.
Ed.III.
:
,
1978.
Text.
Gaya Turabian
Economics : A Text With Readings.
:
,
1978.
Print.