Churchill, R. V. (1970). Business Mathematics. McGraw-Hill.
Cita Chicago (17th ed.)Churchill, Ruel V. Business Mathematics. New York: McGraw-Hill, 1970.
Cita MLA (9th ed.)Churchill, Ruel V. Business Mathematics. McGraw-Hill, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.