Gaya APA
Samuelson, Paul A., Nordhaus, William D.. (1998).
Economics (keenam belas).
New York:
Irwin McGraw-Hill.
Gaya Chicago
Samuelson, Paul A., Nordhaus, William D..
Economics.
keenam belas
New York:
Irwin McGraw-Hill,
1998.
Texts.
Gaya MLA
Samuelson, Paul A., Nordhaus, William D..
Economics.
keenam belas
New York:
Irwin McGraw-Hill,
1998.
Texts.
Gaya Turabian
Samuelson, Paul A., Nordhaus, William D..
Economics.
keenam belas
New York:
Irwin McGraw-Hill,
1998.
Texts.