APA
(1990). OUR BUSINESS AND ECONOMIC WORLD. CALIFORNIA: MICMILLAN /McGRAW-HILL.
Chicago
1990. OUR BUSINESS AND ECONOMIC WORLD. CALIFORNIA: MICMILLAN /McGRAW-HILL.
Harvard
(1990). OUR BUSINESS AND ECONOMIC WORLD. CALIFORNIA: MICMILLAN /McGRAW-HILL.
MLA
OUR BUSINESS AND ECONOMIC WORLD. CALIFORNIA: MICMILLAN /McGRAW-HILL. 1990.