Gaya APA
Samuelson, Paul A, Nordhaus, William D. (1992).
Economics (4).
New York:
Mc Graw Hill.
Gaya Chicago
Samuelson, Paul A, Nordhaus, William D.
Economics.
4
New York:
Mc Graw Hill,
1992.
Text.
Gaya MLA
Samuelson, Paul A, Nordhaus, William D.
Economics.
4
New York:
Mc Graw Hill,
1992.
Text.
Gaya Turabian
Samuelson, Paul A, Nordhaus, William D.
Economics.
4
New York:
Mc Graw Hill,
1992.
Print.