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