Gaya APA
Krugman, Paul R.. (1991).
International economics: theory and policy 2nd ed (2nd).
New York:
HarperCollins.
Gaya Chicago
Krugman, Paul R..
International economics: theory and policy 2nd ed.
2nd
New York:
HarperCollins,
1991.
Text.
Gaya MLA
Krugman, Paul R..
International economics: theory and policy 2nd ed.
2nd
New York:
HarperCollins,
1991.
Text.
Gaya Turabian
Krugman, Paul R..
International economics: theory and policy 2nd ed.
2nd
New York:
HarperCollins,
1991.
Print.