APA Style
Samuelson, Paul A, Nordhaus, William D. (2005).
Economics (eighteenth edition) .
:
.
Chicago Style
Samuelson, Paul A, Nordhaus, William D.
Economics (eighteenth edition).
:
,
2005.
.
MLA Style
Samuelson, Paul A, Nordhaus, William D.
Economics (eighteenth edition).
:
,
2005.
.
Turabian Style
Samuelson, Paul A, Nordhaus, William D.
Economics (eighteenth edition).
:
,
2005.
.