Nickels, W. G. (1987). Understanding business. Times Mirror/Mosby College Pub..
Chicago-čujuhus (17. p.)Nickels, William G. Understanding Business. St. Louis: Times Mirror/Mosby College Pub., 1987.
MLA-čujuhus (9. p.)Nickels, William G. Understanding Business. Times Mirror/Mosby College Pub., 1987.
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