APA
(1990). INTERNATIONAL ECONOMICS. NEW YORK: MCGRAW-HILL PUBLISHING COMPANY.
Chicago
1990. INTERNATIONAL ECONOMICS. NEW YORK: MCGRAW-HILL PUBLISHING COMPANY.
Harvard
(1990). INTERNATIONAL ECONOMICS. NEW YORK: MCGRAW-HILL PUBLISHING COMPANY.
MLA
INTERNATIONAL ECONOMICS. NEW YORK: MCGRAW-HILL PUBLISHING COMPANY. 1990.