Rosenberg, R. R., & Lewis, H. (1963). Business mathematics (Teachers ed. 6th ed.). Gregg Division, McGraw-Hill.
Chicago-viite (17. p.)Rosenberg, R. Robert, ja Harry Lewis. Business Mathematics. Teachers ed. 6th ed. New York: Gregg Division, McGraw-Hill, 1963.
MLA-viite (8. p.)Rosenberg, R. Robert, ja Harry Lewis. Business Mathematics. Teachers ed. 6th ed. Gregg Division, McGraw-Hill, 1963.
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