APA Style
Samuelson, Paul A., Nordhaus, William D.. (2005).
Economics , Eighteenth Edition (18th ed.).
Singapore:
McGraw-Hill.
Chicago Style
Samuelson, Paul A., Nordhaus, William D..
Economics , Eighteenth Edition.
18th ed.
Singapore:
McGraw-Hill,
2005.
Text.
MLA Style
Samuelson, Paul A., Nordhaus, William D..
Economics , Eighteenth Edition.
18th ed.
Singapore:
McGraw-Hill,
2005.
Text.
Turabian Style
Samuelson, Paul A., Nordhaus, William D..
Economics , Eighteenth Edition.
18th ed.
Singapore:
McGraw-Hill,
2005.
Print.