APA Style
Samuelson, Paul A. (1985).
Economics Twelfth Edition .
:
.
Chicago Style
Samuelson, Paul A.
Economics Twelfth Edition.
:
,
1985.
.
MLA Style
Samuelson, Paul A.
Economics Twelfth Edition.
:
,
1985.
.
Turabian Style
Samuelson, Paul A.
Economics Twelfth Edition.
:
,
1985.
.