Gaya APA
Samuelson, Paul A., Nordhaus, William D.. (1985).
Economics (12th ed).
New York:
McGraw-Hill.
Gaya Chicago
Samuelson, Paul A., Nordhaus, William D..
Economics.
12th ed
New York:
McGraw-Hill,
1985.
Text.
Gaya MLA
Samuelson, Paul A., Nordhaus, William D..
Economics.
12th ed
New York:
McGraw-Hill,
1985.
Text.
Gaya Turabian
Samuelson, Paul A., Nordhaus, William D..
Economics.
12th ed
New York:
McGraw-Hill,
1985.
Print.