Gaya APA
Samuelson, Paul A., NORDHAUS, William D. (1989).
ECONOMICS (13).
:
.
Gaya Chicago
Samuelson, Paul A., NORDHAUS, William D.
ECONOMICS.
13
:
,
1989.
Text.
Gaya MLA
Samuelson, Paul A., NORDHAUS, William D.
ECONOMICS.
13
:
,
1989.
Text.
Gaya Turabian
Samuelson, Paul A., NORDHAUS, William D.
ECONOMICS.
13
:
,
1989.
Print.