Pierce, R. (1983). Operational mathematics for business. Wadsworth.
Cita Chicago (17th ed.)Pierce, R.C. Operational Mathematics for Business. Belmont: Wadsworth, 1983.
Cita MLA (9th ed.)Pierce, R.C. Operational Mathematics for Business. Wadsworth, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.