Lapin, L. L. (1991). Quantitative methods for business decisions: With cases (5th ed.). Harcourt Brace Jovanovich.
Cita Chicago (17th ed.)Lapin, Lawrence L. Quantitative Methods for Business Decisions: With Cases. 5th ed. San Diego: Harcourt Brace Jovanovich, 1991.
Cita MLA (9th ed.)Lapin, Lawrence L. Quantitative Methods for Business Decisions: With Cases. 5th ed. Harcourt Brace Jovanovich, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.