ROSENBERG, R. R. (1975). Business Mathematics R. Robert Rosenberg; Harry Lewis; Roy W. Poe. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)ROSENBERG, R. Robert. Business Mathematics R. Robert Rosenberg; Harry Lewis; Roy W. Poe. McGraw-Hill, 1975.
Lua MLA (8ú heag.)ROSENBERG, R. Robert. Business Mathematics R. Robert Rosenberg; Harry Lewis; Roy W. Poe. McGraw-Hill, 1975.
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