FERRELL, O., HIRT, G., & FERRELL, L. (2011). Business: A changing world. McGraw-Hill Book Company.
Chicago-čujuhus (17. p.)FERRELL, O.C, Geoffrey HIRT, juo Linda FERRELL. Business: A Changing World. McGraw-Hill Book Company, 2011.
MLA-čujuhus (9. p.)FERRELL, O.C, et al. Business: A Changing World. McGraw-Hill Book Company, 2011.
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