APA Style
Samuelson, Paul A, Nordhaus, William D. ().
Economics (Eigtheen Edition).
:
.
Chicago Style
Samuelson, Paul A, Nordhaus, William D.
Economics.
Eigtheen Edition
:
,
.
Text.
MLA Style
Samuelson, Paul A, Nordhaus, William D.
Economics.
Eigtheen Edition
:
,
.
Text.
Turabian Style
Samuelson, Paul A, Nordhaus, William D.
Economics.
Eigtheen Edition
:
,
.
Print.