NICHOLSON, R. H. (1986). Mathematics for business and economics. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)NICHOLSON, Robert H. Mathematics for Business and Economics. New York: McGraw-Hill, 1986.
Lua MLA (9ú heag.)NICHOLSON, Robert H. Mathematics for Business and Economics. McGraw-Hill, 1986.
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